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WorksheetsIntroduction to Morphology and Anatomy
Total questions: 150
Worksheet time: 1hrs 15mins
Which statement best defines plant morphology in biological study?
Study of internal plant structures and relationships
Study of ecological interactions among plant species
Study of various external features of plants
Study of genetic regulation of plant traits
Plant anatomy primarily investigates which scope of plant organization?
External organ form across species
Internal structures and relationships of body parts
Evolutionary patterns within plant lineages
Physiological responses to environmental stress
Which component is explicitly included within plant anatomy as described?
Gross macroscopic anatomy, histology, cytology
Population genetics and phylogenetics
Photosynthetic biochemistry pathways
Field ecology and community dynamics
Why is plant morphology described as more fundamental than plant anatomy in the notes?
It explains cellular differentiation mechanisms directly
It focuses on tissues and subcellular components
It relies primarily on molecular genetic techniques
Organ differentiation can be independent of cell arrangements
Which historical figure is named among principal practitioners in plant morphology?
Mendel
Virchow
Goethe
Darwin
The German tradition of plant morphology is characterized as what kind of science?
A reductionist science within biochemistry
An engineering-oriented applied agricultural science
A unifying science transcending systematic boundaries
A regional ecological science focused on habitats
Which statement best summarizes the role of plant morphology in the United States, according to the material?
It primarily serves as a handmaiden for systematics
It is widely practiced in its pure disciplinary form
It originated from American natural history traditions
It is mainly focused on homologies in phylogenetic sense
Which conceptual focus is highlighted as central to plant morphology as a science?
Convergences rather than phylogenetic homologies
Molecular pathways underlying cell division
Mathematical modeling of population dynamics
Abiotic stress physiology in plant tissues
Which statement best captures the perceived modern role of plant morphology within systematics?
Exclusively focused on paleobotanical fossil reconstructions
Largely an outdated catalog of descriptive terms
Primarily a substitute for molecular sequencing workflows
Mainly a provider of characters for circumscription
Contemporary systematics has shifted emphasis toward which type of data when inferring relationships?
Molecular datasets over morphological datasets
Morphological matrices over ecological surveys
Physiological measurements over anatomical sections
Developmental timelines over genetic markers
Applying plant morphology to pteridophytes demonstrates what comparative insight?
Leaf venation identical to monocot patterns
Reproductive cycles matching gymnosperm phenology
Root evolution identical to angiosperm roots
Shoot organization levels comparable to seed plants
Which misconception is addressed regarding the discipline status of plant morphology?
It has no relevance to evolutionary biology
It is universally accepted as a branch of chemistry
Most researchers agree it is purely technological practice
Some practitioners doubt it is a valid scientific discipline
In the diagram, which neighboring field emphasizes homologies in relation to plant morphology?
Plant ecology emphasizes homologies
Plant genetics emphasizes homologies
Plant systematics emphasizes homologies
Plant physiology emphasizes homologies
According to the diagram, plant morphology interfaces with physiology primarily through which focus?
Function emphasis within plant physiology
Phylogeny emphasis within plant physiology
Molecular clock emphasis within plant physiology
Fossil record emphasis within plant physiology
Which modern field integrates plant morphology with gene-level insights during development?
Developmental genetics connecting morphology and gene expression
Population genetics focusing only on allele frequencies
Biostatistics replacing the need for anatomical sections
Biogeography mapping distributions without structural data
Plant anatomy became a detailed investigative science after which technological advance?
Discovery of Mendelian inheritance in the nineteenth century
Development of radiocarbon dating in the twentieth century
Adoption of Sanger sequencing in the twentieth century
Invention of the compound microscope in the seventeenth century
Which areas remain highly relevant applications for plant anatomy today?
Pharmacology and immunology and virology
Agronomy and meteorology and oceanography
Taxidermy and animal physiology and mycology
Systematics and paleobotany and developmental genetics
What practical value is highlighted for plant anatomy in research and education settings?
A method restricted to elite private institutions
A powerful tool to help solve baffling problems
A historical curiosity with little modern use
A decorative aid to beautify laboratory spaces
Which set lists the three major vegetative organs of a typical plant body?
Stem, leaf, flower
Root, stem, leaf
Stem, root, fruit
Root, leaf, seed
Which group correctly represents reproductive parts in angiosperms?
Flowers, fruits, seeds
Leaves, stems, roots
Epidermis, stomata, palisade
Bark, cork, xylem
Plant anatomy primarily investigates which aspect today?
Soil ecology around roots
Population genetics across species
External morphology of whole plants
Internal structure at cellular level
Which structural category includes study of calyx, corolla, androecium, and gynoecium?
Flower anatomy
Wood anatomy
Stem anatomy
Leaf anatomy
Which list best matches key topics in leaf anatomy?
Root tip, endodermis, collar
Ovule, pericarp, accessory fruit
Bark, cork, vascular cambium
Epidermis, stomata, palisade cells
Which option correctly pairs stem anatomy emphasis?
Structure, vascular tissues, buds
Epidermis, stomata, palisade
Ovule, seed, pericarp
Bark, cork, heartwood
Promeristem is best characterized as which type of meristem?
Earliest embryonic meristem
Dormant axillary bud tissue
Later-developing secondary meristem
Permanent tissue of cortex
Which statement about primary meristem is accurate?
Restricted to mature internodes
Derived from promeristem
Cells rarely active and dividing
Originates from secondary tissue
Where is primary meristem commonly located?
Inside heartwood and sapwood
Within mature pericarp layers
On outer epidermal surfaces
Below promeristem at tips
Secondary meristem is distinguished by which feature?
Develops later from primary meristem
Forms first during embryogenesis
Produces primary permanent tissue
Located only at shoot apex
Which classification basis is NOT among those listed for meristems?
Based on nutrient uptake
Based on origin
Based on function
Based on position
Which set names meristems classified by position?
Apical, intercalary, lateral
Primary, secondary, promeristem
Epidermal, vascular, ground
Calyx, corolla, gynoecium
Which leaf part is responsible for attaching the leaf to the stem and may bear stipules?
Petiole attaches to stem, bears midrib structures
Midrib attaches to stem, bears veinlets
Leaf base attaches to stem, may bear stipules
Lamina attaches to stem, may bear veins
In many monocots, the leaf base expands into a sheath. What is the main function of the petiole shown in diagrams?
Raises lamina towards light for photosynthesis
Anchors bud in axil for branch formation
Forms network of veins across blade
Stores food and water like fleshy leaves
Which statement best describes the lamina (leaf blade) visible in the labelled diagram?
Protective scale covering young buds
Swollen base forming pulvinus in legumes
Narrow stalk that connects leaf to stem
Green expanded part with veins and veinlets
Identify the venation type illustrated by a network of veinlets across the blade.
Pinnate venation forms single midrib only
Parallel venation forms concentric rings
Whorled venation forms radiating spokes
Reticulate venation forms a network
Which venation pattern is typical of monocotyledons as shown in the diagrams?
Single central vein without branches
Circular veins around leaf margin
Net-like veins crossing irregularly
Parallel veins running alongside each other
Phyllotaxy describes the arrangement of leaves on a stem. Which pattern shows one leaf at each node in alternating positions?
Whorled phyllotaxy with many leaves
Opposite phyllotaxy with paired leaves
Alternate phyllotaxy with single leaves
Spiral phyllotaxy with clustered leaves
Which phyllotaxy pattern has pairs of leaves at each node lying opposite each other?
Decussate phyllotaxy with random leaves
Opposite phyllotaxy with paired leaves
Whorled phyllotaxy with multiple leaves
Alternate phyllotaxy with single leaves
In a whorled arrangement shown in the diagram, how many leaves arise at a single node?
More than two leaves at one node
Exactly two leaves at each node
Exactly one leaf at every node
No leaves at basal nodes
Which leaf type has incisions that reach the midrib, breaking the blade into several leaflets as depicted?
Compound leaf with separate leaflets
Simple leaf with entire lamina
Floral leaf forming corolla parts
Scale leaf with protective role
Identify the pinnately compound leaf shown in the images. What structural axis do the leaflets share?
Petiole representing the stem
Rachis representing the midrib
Pulvinus representing the base
Stipule representing appendage
Palmatley compound leaves have leaflets attached at a common point. Where is this point located according to the diagram?
Beside the axillary bud
Along the length of the rachis
At the base of the lamina
At the tip of the petiole
Which modification of leaves aids climbing, as shown by slender structures in the image?
Spines used for defense
Tendrils used for climbing
Fleshy leaves storing food
Scales protecting buds
In some leguminous plants, the leaf base is swollen. What is this structure called?
Rachis along leaflets
Pulvinus at leaf base
Midrib within lamina
Sheath around stem
Which labeled feature provides rigidity and transport channels within the lamina?
Leaf margin and apex shape
Petiole and stipules at base
Veins and veinlets in blade
Axillary bud near node
A bud is present in the axil of the petiole in both simple and compound leaves. Where is the bud absent according to the diagram description?
Beside the midrib within lamina
At the tip of petiole in palmate
At the node bearing opposite leaves
In the axil of individual leaflets
Identify the structure termed stipules in leaves. Which option best defines stipules?
Paired glands on lamina margin near tip
Small hairs on leaf surface forming trichomes
Single outgrowth on midrib near leaf apex
Pair of outgrowths at petiole base of leaf
A leaf lacking stipules is described as which condition?
Ex-stipulate leaf without stipules
Persistant stipulate leaf with hairs
Ochreate stipulate leaf with tube
Deciduous stipulate leaf with spines
Which statement correctly distinguishes persistent from deciduous stipules?
Persistent remain as leaf persists; deciduous fall early
Persistent form ochrea tubes; deciduous form wings
Persistent fall at bud opening; deciduous remain
Persistent fuse into tendrils; deciduous become spines
Which type is correctly matched with its description: scaly stipules?
Small membranous scales protecting buds
Large green leaf-like edible structures
Wing-like fused lateral adnate structures
Small green lateral stipules at petiole
Free lateral stipules are best described by which option?
Small green stipules present freely at petiole base
Large fused margins forming hollow ochrea tube
Paired stipules between petioles of opposite leaves
Stipules modified into tendrils in some plants
Which figure label shows an ochreate stipule of Polygonum?
Figure A with tubular sheath at node
Figure B with interpetiolar sheet at base
Figure C with wing-like adnate stipules
Figure A with spinous stipules forming spines
Axillary stipules result from which anatomical fusion?
Stipules of a leaf fuse forming single axillary stipule
Veinlets fuse forming palmate venation strands
Leaflet bases fuse forming ochrea around node
Midrib and lamina margins fuse forming wing
Tendrillar stipules of Smilax represent which modification?
Stipules modified into spines
Stipules forming interpetiolar sheets
Stipules forming hollow tubes
Stipules modified into tendrils
Spinous stipules are characteristic in which plants according to examples?
Polygonum and rose species
Acacia and Zizyphus species
Smilax and pea species
Sunflower and mustard species
Parallel venation is defined by which arrangement of veins?
Veins radiate from petiole base into lobes
Network of reticulate anastomosing veinlets
One midrib with irregular branching veins
Many veins of equal size run parallel
Which sub-type describes monocots with a single prominent vein giving parallel laterals?
Pinnate or unicostate parallel venation
Palmate or multicostate parallel venation
Reticulate pinnate venation in dicots
Decussate opposite cyclic phyllotaxis
Palmate parallel venation differs from pinnate parallel venation in what feature?
Midrib absent and veins diverge irregularly
Veinlets form network converging to apex
Single midrib gives off parallel lateral branches
Multiple principal veins run parallel to each other
Which leaf type most commonly shows parallel venation according to examples provided?
Gymnosperms like pine and fir
Dicots like rose and pea
Monocots like grasses and banana
Aquatic herbs like Hydrilla
In the phyllotaxis figures, which label represents alternate arrangement?
Figure A with single leaf per node
Figure B with opposite decussate leaves
Figure C with whorled leaves at each node
Figure D with whorled leaves of Alstonia
A leaf with stipules forming a hollow tube encircling the stem from node upward is termed what?
Ochreate stipule forming ochrea
Spinous stipule forming spines
Adnate stipule forming wings
Interpetiolar stipule forming sheet
Which term describes leaves that fall off very early in the plant’s life?
Evergreen
Persistent
Deciduous
Caducous
Leaves that drop at the end of each growing season are best described as:
Radical
Persistent
Deciduous
Caducous
Which term refers to leaves remaining functional on the plant for more than one season?
Deciduous
Caducous
Persistent
Remal
In the diagram, which insertion type indicates leaves developing on the main stem?
Paripinnate
Radical
Remal
Cauline
Leaves that develop on branches are termed:
Cauline
Remal
Radical
Imparipinnate
Leaves appearing to come out from roots correspond to which insertion type?
Unifoliate
Radical
Remal
Cauline
Which diagram type shows a pinnately compound leaf with an odd terminal leaflet?
Imparipinnate
Paripinnate
Palmately compound
Unipinnate
A pinnately compound leaf with paired leaflets and no terminal leaflet is:
Bipinnate
Tripinnate
Imparipinnate
Paripinnate
Which category increases the level of pinnation from once to thrice along the rachis?
Paripinnate to imparipinnate
Palmately to pinnately
Unifoliate to quadrifoliate
Unipinnate to tripinnate
In the palmately compound series, a leaf with four leaflets is termed:
Trifoliate
Quadrifoliate
Bifoliate
Multifoliate
Which statement best distinguishes palmately compound from pinnately compound leaves in the diagram?
Leaflets radiate from one point
Leaflets have parallel venation
Leaflets align along a rachis
Leaflets arranged in opposite pairs
Identify the pinnation level shown in figure C of the third image.
Bipinnate
Unipinnate
Decompound
Tripinnate
Which modification converts an entire leaf into a tendril as shown for wild pea?
Leaf tendril
Phyllode
Leaf spine
Leaf pitcher
Flattened petioles functioning as leaf blades in some species are called:
Phyllodes
Pitchers
Bladders
Spines
Which modification forms bladders in submerged insectivorous plants like Utricularia?
Leaf pitcher
Leaf bladder
Leaf spine
Leaf tendril
Considering leaf duration, which plant type is most associated with persistent leaves?
Ephemeral annuals
Evergreen species
Root crops
Deciduous trees
Which leaf modification primarily aids climbing by coiling around supports, as shown in the labeled diagrams of pea-like plants?
Leaf spines for defense
Pitcher leaves for trapping
Leaf tendrils for climbing
Leaf hooks for anchoring
In the figure labeled 'Leaf spines', what is the main adaptive function of the pointed leaf structures?
Enhance transpiration rates
Increase photosynthetic area
Store excess carbohydrates
Reduce herbivory pressure
The lower-left figure contrasts a leaf tendril and a leaf hook. Which statement best differentiates them?
Neither coils; both clasp
Both coil; hooks photosynthesize
Hooks coil; tendrils clasp
Tendrils coil; hooks clasp
In the pitcher plant leaf figure, what primary function is associated with the tubular leaf structures?
Enhanced water transport
Increased stomatal density
Nitrogen acquisition via trapping
Mechanical support for stems
Which description correctly defines a simple leaf from the comparison table?
Each leaflet with separate veins
Leaflets borne on a rachis
Lamina divided into many leaflets
Lamina undivided as one piece
Which feature is typical of a compound leaf according to the comparison?
Leaflets arise from rachis
Rachis is absent in leaf
Leaf blade is one entire piece
Veins may be palmate or pinnate
From the venation comparison, parallel venation is most characteristic of which group?
Bryophyte leaves primarily
Gymnosperms exclusively
Monocot families typically
Dicot families typically
Which statement best summarizes reticulate venation?
No midrib is present
Smaller veins form a network
Veins terminate at leaflets
Equal-sized veins run parallel
Which pairing of examples and venation type is correct based on the table?
Wheat—reticulate venation
Rose—parallel venation
Rice—parallel venation
Mango—parallel venation
Which feature distinguishes simple from compound leaves in terms of veins?
Simple leaves have palmate rachis
Each leaflet has its own veins
Compound leaves share one vein set
Simple leaves lack veins
In the stem diagram, which label correctly identifies the region where leaves arise along the axis?
Nodes along the axis
Internodes between nodes
Axillary meristem zone
Apical bud region
Which statement best distinguishes nodes from internodes on a stem when examining the diagram?
Nodes bear leaves and buds
Internodes are at leaf origins
Nodes are between two leaves
Internodes bear leaves and buds
Based on the stem modifications list, which structure is a lateral branch that arches down to touch the ground after aerial growth?
Stolon arching downward
Offset with short internodes
Sucker arising underground
Thorn from axillary bud
Which stem modification is a green, flattened or fleshy cylindrical photosynthetic stem found in arid plants?
Sucker horizontal shoot
Phylloclade photosynthetic stem
Stolon creeping branch
Offset rosette bearer
Looking at functions of the stem, which is NOT primarily a stem function?
Vegetative propagation
Synthesis of plant hormones
Conducts water and minerals
Supports leaves and flowers
Underground stems of potato and ginger exemplify which modification purpose shown in the diagram?
Food storage organs
Protection structures
Respiratory roots
Climbing adaptations
In the root system diagram, which root type originates from the base of the stem and replaces the short-lived primary root?
Fibrous roots in monocots
Tap roots in dicots
Pneumatophores in trees
Adventitious roots in dicots
Which root system is characterized by a dominant primary root with lateral branches such as secondary and tertiary roots?
Prop root system
Adventitious system
Fibrous root system
Tap root system
Identify the correct sequence of root regions from apex upward in the longitudinal root diagram.
Root cap, meristematic, elongation, maturation
Maturation, elongation, meristematic, cap
Meristematic, maturation, elongation, cap
Root cap, elongation, maturation, meristematic
Which root structure consists of fine thread-like extensions from epidermal cells that absorb water and minerals?
Root hairs near maturation
Offsets of stem nodes
Prop roots at nodes
Stilt roots below stem
Which modification listed supports a banyan tree by hanging from branches to the ground?
Pneumatophores in swamps
Suckers in bananas
Stilt roots in maize
Prop roots supporting banyan
Which modification is an upward-growing root that emerges from the soil to aid respiration in swampy habitats?
Prop roots from branches
Adventitious suckers
Stilt roots for support
Pneumatophores for oxygen
From the shoot diagram, which feature directly shows the repetitive units between two consecutive nodes?
Leaf rosettes
Axillary thorns
Internodes segments
Offsets nodes
Which comparison best separates tap roots from fibrous roots using the diagrams and descriptions?
Tap roots are short-lived; fibrous roots are long-lived
Tap roots have a main axis; fibrous roots form many equal roots
Tap roots arise from stem base; fibrous roots elongate from radicle
Tap roots have many equal roots; fibrous roots have one main axis
Which term describes a flower that can be divided into two equal halves along any radial plane through the center?
Actinomorphic symmetry
Zygomorphic symmetry
Asymmetric morphology
Perigynous condition
In a zygomorphic flower, division into equal halves is possible along which type of plane?
Any radial plane
Single vertical plane
Multiple horizontal planes
No plane possible
Which inflorescence type has the main axis terminating in a flower, limiting its growth?
Cymose inflorescence
Panicle inflorescence
Umbel inflorescence
Racemose inflorescence
A typical angiosperm flower has how many whorls on the thalamus?
Four distinct whorls
Three main whorls
Two reproductive whorls
Five concentric whorls
Which pair lists the accessory organs of a typical flower?
Calyx and corolla
Bracts and receptacle
Thalamus and pedicel
Androecium and gynoecium
Flowers with bracts are termed what?
Bracteate flowers
Hypogynous flowers
Epigynous flowers
Ebracteate flowers
Which condition places the gynoecium highest with other parts below it, resulting in a superior ovary?
Hypogynous condition
Perigynous condition
Asymmetric condition
Epigynous condition
In the perigynous condition, what is the relative position of the ovary?
Completely inferior ovary
Half inferior ovary
Completely superior ovary
Lateral inferior ovary
Epigynous flowers are characterized by which feature of the thalamus and ovary?
Thalamus fuses above ovary, ovary inferior
Thalamus below ovary, ovary superior
Thalamus absent, ovary superior
Thalamus level with ovary, ovary half inferior
Which statement best describes actinomorphic versus zygomorphic symmetry?
Radial symmetry allows many planes; bilateral allows one
Bilateral symmetry allows many planes; radial allows one
Both symmetries allow identical multiple planes
Radial symmetry allows no planes; bilateral allows two
The swollen end of the pedicel that bears floral whorls is called what?
Corolla or petals
Calyx or sepals
Bracts or scales
Thalamus or receptacle
Based on number of floral appendages, which term describes multiples of five?
Tetramerous condition
Trimerous condition
Monomerous condition
Pentamerous condition
In the labeled flower diagram, which whorl contains the male reproductive structures?
Calyx with sepals
Corolla with petals
Androecium with stamens
Gynoecium with carpels
Which aestivation type shows sepals or petals in a whorl just touching at margins without overlapping?
Vexillary sequence
Valvate arrangement
Imbricate overlap
Twisted pattern
In twisted aestivation, how do adjacent petals relate?
All overlap one another randomly
Largest petal covers two lateral ones
Each overlaps the next margin
Edges meet without overlap
Which statement correctly describes androecium components?
Sterile carpels are called staminodes
Each anther is single chambered
Each stamen bears filament and anther
Each stamen has style and stigma
When stamens are attached to petals, they are described as what?
Polypetalous corolla
Epipetalous condition
Synandrous condition
Monadelphous bundle
Which bundling of stamens places them into a single group by filaments?
Synandrous attachment
Polyadelphous grouping
Monadelphous grouping
Diadelphous grouping
Gynoecium is made of one or more units called what?
Stamens
Carpels
Sepals
Petals
Identify the correct sequence of parts within a single carpel from receptive surface to basal region.
Stigma, ovary, style
Stigma, style, ovary
Ovary, style, stigma
Style, stigma, ovary
What distinguishes apocarpous from syncarpous pistils?
Single vs double ovules
Free vs fused carpels
Petals united vs free
Axile vs basal placenta
Which placentation type bears ovules along a ventral ridge forming two rows?
Free central placentation
Basal placentation
Parietal placentation
Marginal placentation
In axile placentation, where are ovules attached within the ovary?
Inner wall periphery
Central axis in multilocular ovary
Base with single ovule
Central axis without septa
Parietal placentation leads to what structural change in the ovary?
Reduction to single chamber
Loss of placenta entirely
Formation of multilocular axis
Development of false septum
Which diagram shows basal placentation?
Ovules on inner wall periphery
Single ovule at ovary base
Ovules attached to central axis
Ovules along margin ridge
Vexillary (papilionaceous) aestivation is characterized by what arrangement?
Largest standard overlapping two wings
Each petal overlapping next margin
Margins touching without overlap
Irregular random overlaps
Which statement best defines a fruit in flowering plants?
A ripened ovary formed after fertilisation
A matured seed coat before fertilisation
An enlarged receptacle lacking ovules
A fleshy perianth enclosing the embryo
Parthenocarpic fruit is characterized by which process?
Fruit formation after double fertilisation
Pericarp development from stony endocarp
Fruit formation without fertilisation of ovary
Seedless ovule after endosperm fusion
In a typical drupe like mango, which pericarp layer is stony and hard?
Endocarp forms the stony inner layer
Mesocarp forms the stony middle layer
Perianth forms the stony protective layer
Epicarp forms the stony outer layer
Which sequence correctly lists the differentiated pericarp layers?
Mesocarp, epicarp, endocarp
Epicarp, mesocarp, endocarp
Epicarp, endocarp, mesocarp
Endocarp, mesocarp, epicarp
Which statement about coconut mesocarp is accurate?
Mesocarp is the same as seed coat
Mesocarp is thin and papery
Mesocarp is stony and lignified
Mesocarp is fibrous in coconut fruit
Within a seed, what comprises the embryo in dicots?
One scutellum with coleoptile
Endosperm tissue with aleurone
Embryonal axis with two cotyledons
Seed coat fused with perianth
In seeds like bean and pea, which feature is typical at maturity?
Highly endospermous tissues
Scutellum replacing cotyledons
Aleurone-rich seed coats
Non-endospermous mature seeds
Which structures protect the plumule and radicle in monocot seeds?
Hilum and micropyle pores
Coleoptile and coleorhiza sheaths
Scutellum and aleurone layer
Endocarp and mesocarp walls
The monocot cotyledon is specially termed as what?
Aleurone in endosperm
Pericarp inner layer
Scutellum in grass embryos
Coleoptile sheath tissue
Which symbol in floral formula denotes a superior ovary?
Male symbol preceding G
G with underline or bar above
G with bar below the letter
Circle before the K symbol
What does ⊕ indicate in a floral formula?
Bisexual flower nature
Presence of bracteates
Zygomorphic floral symmetry
Actinomorphic floral symmetry
In the floral formula K2+2 C4 A2+4 G(2), what does A2+4 convey?
Androecium with four alternate sepals
Androecium with two plus four stamens
Androecium with two whorls of petals
Androecium with four fused carpels
During double fertilisation, which tissue typically forms the endosperm?
Haploid aleurone protein layer
Diploid embryo sac tissue
Triploid food-storing endosperm
Tetraploid cotyledon reserve
In the diagram of fruit structure, which layer directly surrounds the seed and is part of the pericarp?
Placenta tissue attaching ovules
Mesocarp layer forming fleshy middle
Exocarp layer surrounding exterior
Endocarp layer enclosing the seed
Which statement best distinguishes a true fruit from a false fruit as depicted with grape and apple?
False fruit lacks a pericarp entirely
False fruit develops solely from the ovary
True fruit forms from fused floral parts
True fruit develops from the ovary only
Which pericarp layer commonly contributes most to edible flesh in many fruits?
Exocarp providing tough outer skin
Mesocarp forming thick fleshy portion
Testa composing the seed coat
Endocarp creating stony inner shell
In the seed dispersal diagram, which plant exemplifies wind dispersal by using parachute-like structures?
Maple with winged samaras
Coconut with fibrous husk
Dandelion with pappus hairs
Burdock with hooked bracts
Which trait most enhances water dispersal as shown by coconut?
Light seeds with pappus hairs
Buoyant fruits with air-filled husk
Sticky surfaces adhering to animals
Explosive dehiscent pods eject seeds
Which mechanism is illustrated by milkweed and lupins releasing seeds from splitting pods?
Animal ingestion dispersal
Water buoyancy dispersal
Explosive expulsion dispersal
Wind samara dispersal
Which adaptation allows burdock to use animals for dispersal?
Dehiscent pods that burst open
Winged samaras that spin in air
Air bladders that increase buoyancy
Hooked appendages that cling to fur
Which is the most plausible dispersal agent for cattail seeds shown near aquatic habitats?
Explosive pods launching seeds
Animals burying starchy corms
Water transporting heavy nuts
Wind carrying lightweight fluff
Which fruit structure term collectively refers to exocarp, mesocarp, and endocarp?
Core of accessory tissue
Testa of the seed
Pericarp of the fruit
Placenta of ovary wall
Reasoning with evidence: A shrub produces small dry achenes each with feathery hairs. Which dispersal mechanism is most likely and why?
Wind dispersal because hairs increase drag
Animal dispersal because hairs irritate skin
Explosive dispersal because hairs reduce friction
Water dispersal because hairs trap moisture
Planning application: To colonize distant riverbanks, which fruit trait should be selected during breeding?
Fibrous husks that improve flotation
Sticky pericarps that adhere to fur
Hard endocarps that resist chewing
Winged samaras that spin efficiently
