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Worksheets

Физ

Total questions: 141

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

Which animals lack a backbone?

a)

Invertebrates

b)

Mammals

c)

Amphibians

d)

Vertebrates

e)

Reptiles

2.

Which group of animals primarily eats other animals?

a)

Carnivores

b)

Omnivores

c)

Herbivores

d)

Amphibians

e)

Invertebrates

3.

What type of cells can differentiate into various types of body cells?

a)

Stem cells

b)

Germ cells

c)

Zygote cells

d)

Blastocyst cells

e)

Red blood cells

4.

What is the primary feature of reptiles?

a)

Scaly skin and egg-laying

b)

Feathers

c)

Live birth

d)

Fur

e)

Endothermic temperature regulation

5.

What is ichthyology the study of?

a)

Fishes

b)

Birds

c)

Mammals

d)

Reptiles

e)

Amphibians

6.

What does 'sexual dimorphism' mean?

a)

Differences in appearance between males and females of the same species

b)

Migration patterns of species

c)

Lack of a backbone

d)

The ability to reproduce sexually

e)

Presence of a notochord

7.

Which animals have an external skeleton made of chitin?

a)

Insects and crustaceans

b)

Birds

c)

Mammals

d)

Amphibians

e)

Fish

8.

What are chelicerae?

a)

Head appendages in spiders and scorpions

b)

Teeth in mammals

c)

Sensory organs in birds

d)

Scales on reptiles

e)

Fins in fish

9.

What is symbiosis?

a)

A mutually beneficial relationship between organisms

b)

An adaptation to survive in cold environments

c)

A process of photosynthesis

d)

A competition between organisms

e)

A form of migration

10.

Which animals produce milk for their young?

a)

Mammals

b)

Birds

c)

Reptiles

d)

Amphibians

e)

Fish

11.

What is the study of embryonic development called?

a)

Embryology

b)

Zoology

c)

Genetics

d)

Microbiology

e)

Histology

12.

What are gametes?

a)

Reproductive cells

b)

Cells that form the nervous system

c)

Cells that produce bile

d)

Immune cells

e)

Cells that store calcium

13.

Which structure forms after the fusion of a sperm and an egg?

a)

Zygote

b)

Morula

c)

Blastula

d)

Gamete

e)

Placenta

14.

What is the hollow ball of cells formed in early embryonic development called?

a)

Blastula

b)

Allantois

c)

Morula

d)

Zygote

e)

Chorion

15.

What is the function of the placenta during pregnancy?

a)

Acting as an intermediary between the mother and fetus

b)

Protecting the fetus from infections

c)

Producing hormones

d)

Generating eggs

e)

Producing sperm

16.

What type of cell division results in two identical daughter cells?

a)

Mitosis

b)

Meiosis

c)

Binary fission

d)

Fertilization

e)

Morphogenesis

17.

Which reproductive cells eventually develop into eggs and sperm?

a)

Germ cells

b)

Stem cells

c)

Zygotes

d)

Embryos

e)

Morula

18.

What is the name of the process that reduces chromosome numbers in sex cells?

a)

Meiosis

b)

Fertilization

c)

Mitosis

d)

Implantation

e)

Differentiation

19.

Which early embryonic structure is a solid mass of cells?

a)

Morula

b)

Blastula

c)

Placenta

d)

Zygote

e)

Germ cell

20.

What is the role of stem cells?

a)

Developing into many different cell types

b)

Breaking down food

c)

Storing genetic information

d)

Producing hormones

e)

Forming the placenta

21.

What is a tissue?

a)

A group of cells with similar structure and function

b)

A group of molecules working together

c)

A single type of organ

d)

A protective layer of the skin

e)

An organelle within the cell

22.

Which type of tissue is responsible for coordinating and controlling body activities?

a)

Nervous tissue

b)

Connective tissue

c)

Epithelial tissue

d)

Muscle tissue

e)

Skeletal tissue

23.

What are the specialized cells that make up the heart muscle called?

a)

Cardiac cells

b)

Smooth muscle cells

c)

Skeletal muscle cells

d)

Connective cells

e)

Neurons

24.

Which cells are responsible for transporting oxygen in the blood?

a)

Red blood cells (erythrocytes)

b)

Platelets

c)

White blood cells

d)

Neurons

e)

Plasma cells

25.

What is the function of skeletal muscles?

a)

Providing body movement and maintaining posture

b)

Transporting blood

c)

Digesting food

d)

Regulating hormone levels

e)

Absorbing nutrients

26.

Which type of plant tissue is responsible for transporting water and minerals?

a)

Xylem

b)

Epidermis

c)

Cortex

d)

Phloem

e)

Collenchyma

27.

What are meristems in plants?

a)

Growth regions with dividing cells

b)

Storage cells

c)

Protective tissues

d)

Vascular tissues

e)

Photosynthetic tissues

28.

What is the function of collenchyma in plants?

a)

Providing mechanical support

b)

Transporting sugars

c)

Producing seeds

d)

Conducting water

e)

Protecting roots

29.

What type of tissue is sclerenchyma?

a)

Mechanical tissue with thick cell walls

b)

Photosynthetic tissue

c)

Reproductive tissue

d)

Vascular tissue

e)

Meristematic tissue

30.

Which cells produce melanin in the body?

a)

Pigment cells

b)

Stem cells

c)

Red blood cells

d)

Cardiac cells

e)

Pancreatic cells

31.

What is the main process by which plants produce energy?

a)

Photosynthesis

b)

Fermentation

c)

Glycolysis

d)

Respiration

e)

Chemosynthesis

32.

What is the primary function of roots in vascular plants?

a)

Anchoring the plant and absorbing water

b)

Transporting oxygen

c)

Producing flowers

d)

Storing carbon dioxide

e)

Releasing seeds

33.

Which part of the flower produces pollen?

a)

Stamen

b)

Ovary

c)

Petal

d)

Sepal

e)

Stigma

34.

What is the outer part of a flower that protects the bud called?

a)

Sepal

b)

Stigma

c)

Petal

d)

Style

e)

Pistil

35.

What type of plant tissue is responsible for transporting sugars?

a)

Phloem

b)

Epidermis

c)

Xylem

d)

Collenchyma

e)

Cortex

36.

What is a stoma in plants?

a)

A pore in the leaf epidermis for gas exchange

b)

A storage organ

c)

A photosynthetic pigment

d)

A reproductive organ

e)

A type of vascular tissue

37.

What is the primary function of pili in bacteria?

a)

Helping with attachment to surfaces

b)

Moving the cell

c)

Producing energy

d)

Synthesizing proteins

e)

Breaking down food

38.

What type of microorganism is a prion?

a)

Infectious protein

b)

Virus

c)

Bacterium

d)

Fungi

e)

Protozoan

39.

What is the main characteristic of fungi?

a)

Chitin cell walls and spore reproduction

b)

Ability to photosynthesize

c)

Lack of a cell wall

d)

Lack of a nucleus

e)

Presence of chlorophyll

40.

What is heredity?

a)

The transmission of genetic traits from parents to offspring

b)

The process of cellular division

c)

Protein synthesis

d)

Development of reproductive cells

e)

Mutation of DNA

41.

What are alleles?

a)

Different versions of a gene

b)

Segments of DNA that code for proteins

c)

Enzymes that speed up transcription

d)

Mutations in chromosomes

e)

Traits passed from parents

42.

What happens during crossing over in meiosis?

a)

Exchange of genetic material between homologous chromosomes

b)

Chromosome alignment

c)

DNA replication

d)

Protein synthesis

e)

Fertilization

43.

What are codons?

a)

Sequences of three nucleotides in DNA or RNA

b)

Segments of DNA

c)

Reproductive cells

d)

Types of chromosomes

e)

Organelles in cells

44.

What is transcription?

a)

Copying information from DNA to RNA

b)

DNA replication in the nucleus

c)

The process of protein synthesis

d)

Exchange of genetic material in meiosis

e)

Transfer of traits from parent to offspring

45.

What is the main role of chromosomes in the cell?

a)

Carrying genetic information

b)

Breaking down nutrients

c)

Storing energy

d)

Transporting proteins

e)

Producing enzymes

46.

What is a mutation?

a)

A change in the DNA sequence

b)

A normal sequence of DNA

c)

A type of protein

d)

A cell division process

e)

A genetic disease

47.

What is a genome?

a)

The complete genetic material of an organism

b)

A type of protein

c)

Group of alleles

d)

A single chromosome

e)

A mutation in DNA

48.

What is the process of producing identical genetic copies of an organism called?

a)

Cloning

b)

Translation

c)

Transcription

d)

Fertilization

e)

Meiosis

49.

What are the different forms of a gene called?

a)

Alleles

b)

Mutations

c)

Chromosomes

d)

Codons

e)

Nucleotides

50.

What is inversion in genetics?

a)

Reversal of a DNA segment within a chromosome

b)

Addition of nucleotides

c)

Deletion of a gene

d)

Replication of DNA

e)

Splitting of chromosomes

51.

What does glycolysis break down?

a)

Glucose

b)

Lipids

c)

Amino acids

d)

Fatty acids

e)

Nucleotides

52.

What is the function of the deletion process in genetics?

a)

Removing nucleotides from a DNA sequence

b)

Repairing damaged DNA

c)

Creating new proteins

d)

Increasing chromosome numbers

e)

Activating gene expression

53.

What is the primary function of enzymes?

a)

Speeding up chemical reactions

b)

Storing energy

c)

Transporting nutrients

d)

Producing hormones

e)

Absorbing water

54.

Which molecule is the main energy currency of the cell?

a)

ATP

b)

RNA

c)

Proteins

d)

DNA

e)

Lipids

55.

What is the process of converting glucose into energy called?

a)

Glycolysis

b)

Photosynthesis

c)

Respiration

d)

Fermentation

e)

Filtration

56.

What type of reaction breaks down large molecules into smaller ones?

a)

Catabolic reaction

b)

Photosynthesis

c)

Anabolic reaction

d)

Oxidation reaction

e)

Endothermic reaction

57.

What is chemosynthesis?

a)

Using chemical energy to produce carbohydrates

b)

Breaking down glucose without oxygen

c)

Using light to produce energy

d)

Synthesis of ATP

e)

Absorption of nutrients by cells

58.

Which cycle produces ATP, NADH, FADH2, and CO2?

a)

Krebs cycle

b)

Glycolysis

c)

Calvin cycle

d)

Photosynthesis

e)

Glycogen synthesis

59.

What is the Calvin cycle?

a)

A process in plants to convert CO₂ into glucose

b)

Process in animals to produce ATP

c)

Breakdown of glucose in respiration

d)

Synthesis of RNA from DNA

e)

Transport of oxygen in cells

60.

Which type of molecule is primarily used for long-term energy storage?

a)

Lipids

b)

Proteins

c)

Carbohydrates

d)

Nucleic acids

e)

Vitamins

61.

What are lipids primarily used for?

a)

Storing energy

b)

Carrying oxygen

c)

Synthesizing proteins

d)

Breaking down waste

e)

Transporting water

62.

What is a plasmid?

a)

A circular DNA molecule in bacteria

b)

A protein in viruses

c)

An organelle in eukaryotes

d)

A type of RNA

e)

A part of the bacterial cell wall

63.

What is pasteurization used for?

a)

Destroying microorganisms in liquids and foods

b)

Producing enzymes

c)

Synthesizing proteins

d)

Breaking down carbohydrates

e)

Transporting nutrients

64.

What is a pilus in bacteria?

a)

A hair-like structure for attachment

b)

A capsule for protection

c)

A flagellum for movement

d)

A ribosome for protein synthesis

e)

A DNA region

65.

What do prions lack that distinguishes them from other infectious agents?

a)

Nucleic acids

b)

Proteins

c)

Cell walls

d)

Membranes

e)

Ribosomes

66.

What is a capsid?

a)

The protein shell of a virus

b)

A type of DNA molecule

c)

The outer layer of bacteria

d)

The structure of bacterial RNA

e)

A type of enzyme

67.

What is the function of the human lungs?

a)

Facilitating gas exchange (oxygen and carbon dioxide)

b)

Circulating blood

c)

Producing hormones

d)

Storing nutrients

e)

Filtering waste

68.

Which part of the body connects the legs to the torso?

a)

Hip

b)

Pelvis

c)

Spine

d)

Rib cage

e)

Abdomen

69.

What is the role of the large intestine?

a)

Turning waste into stool and absorbing water

b)

Digesting food

c)

Producing enzymes

d)

Filtering blood

e)

Breaking down proteins

70.

What is the diaphragm's primary function?

a)

Assisting in breathing

b)

Digesting food

c)

Circulating blood

d)

Protecting the lungs

e)

Regulating temperature

71.

What is the primary role of the bladder?

a)

Storing urine

b)

Filtering blood

c)

Producing hormones

d)

Facilitating digestion

e)

Producing enzymes

72.

What type of blood vessel carries blood back to the heart?

a)

Veins

b)

Capillaries

c)

Arteries

d)

Lymph nodes

e)

Nerves

73.

What organ processes nutrients and detoxifies harmful substances?

a)

Liver

b)

Stomach

c)

Kidneys

d)

Lungs

e)

Heart

74.

What is the primary sensory function of the eyes?

a)

Enabling vision

b)

Detecting sound

c)

Regulating balance

d)

Detecting pressure

e)

Producing tears

75.

Which organ pumps blood throughout the body?

a)

Heart

b)

Brain

c)

Stomach

d)

Lungs

e)

Liver

76.

What is the structural and functional unit of life?

a)

Cell

b)

Organ

c)

Molecule

d)

Tissue

e)

System

77.

Which gland produces stress hormones like cortisol?

a)

Adrenal gland

b)

Pineal gland

c)

Thyroid gland

d)

Pituitary gland

e)

Salivary gland

78.

What hormone does the pancreas produce to regulate blood sugar levels?

a)

Insulin

b)

Thyroxine

c)

Melatonin

d)

Glucagon

e)

Cortisol

79.

What is the primary function of the salivary glands?

a)

Producing saliva for digestion and lubrication

b)

Producing hormones

c)

Regulating sleep

d)

Detoxifying blood

e)

Absorbing nutrients

80.

Which gland regulates metabolism?

a)

Thyroid gland

b)

Pineal gland

c)

Adrenal gland

d)

Thymus gland

e)

Pancreas

81.

What is the role of the parathyroid glands?

a)

Regulating calcium levels in the blood

b)

Producing T-cells

c)

Regulating sleep

d)

Producing insulin

e)

Filtering waste

82.

What is the study of microscopic organisms called?

a)

Microbiology

b)

Zoology

c)

Genetics

d)

Histology

e)

Biochemistry

83.

Which of the following lacks nucleic acids?

a)

Prions

b)

Viruses

c)

Fungi

d)

Protists

e)

Bacteria

84.

What is the main purpose of pasteurization?

a)

Destroying harmful microorganisms in liquids and foods

b)

Producing enzymes

c)

Increasing nutrient content

d)

Breaking down proteins

e)

Synthesizing DNA

85.

Which structure is used by bacteria for movement?

a)

Flagellum

b)

Plasmid

c)

Ribosome

d)

Capsule

e)

Pilus

86.

Which stage of embryonic development involves significant growth and organ maturation?

a)

Fetal development

b)

Morula

c)

Gamete formation

d)

Blastula

e)

Meiosis

87.

What is the primary function of ATP in the cell?

a)

Providing energy for cellular processes

b)

Facilitating protein synthesis

c)

Storing genetic information

d)

Breaking down waste

e)

Absorbing nutrients

88.

What process converts chemical energy into carbohydrates?

a)

Chemosynthesis

b)

Fermentation

c)

Respiration

d)

Photosynthesis

e)

Glycolysis

89.

What is the purpose of the Krebs cycle?

a)

Producing ATP, NADH, and FADH₂

b)

Breaking down proteins

c)

Transporting oxygen

d)

Synthesizing carbohydrates

e)

Absorbing water

90.

Which molecule prevents cellular oxidation?

a)

Antioxidant

b)

Protein

c)

Lipid

d)

ATP

e)

Nucleic acid

91.

What are the building blocks of proteins?

a)

Amino acids

b)

Sugars

c)

Lipids

d)

Nucleotides

e)

Enzymes

92.

What is a zygote?

a)

A fertilized egg formed by the union of gametes

b)

An unfertilized egg

c)

A cluster of cells

d)

A developing fetus

e)

A type of stem cell

93.

Which structure forms during early embryonic development as a hollow ball of cells?

a)

Blastula

b)

Zygote

c)

Morula

d)

Placenta

e)

Allantois

94.

What is the role of the placenta?

a)

Acting as an intermediary between mother and fetus

b)

Producing stem cells

c)

Providing hormones for metabolism

d)

Developing organs

e)

Filtering waste

95.

What is meiosis?

a)

A process that reduces chromosome numbers in sex cells

b)

An energy production cycle

c)

A type of tissue formation

d)

A method of DNA repair

e)

The union of gametes

96.

What are germ cells?

a)

Reproductive cells like eggs and sperm

b)

Immune cells

c)

Blood cells

d)

Cells that produce bile

e)

Neurons

97.

What is the main function of xylem?

a)

Transporting water and dissolved minerals

b)

Photosynthesis

c)

Storing nutrients

d)

Producing seeds

e)

Supporting growth

98.

Which structure surrounds and protects the plant cell?

a)

Cell wall

b)

Cell membrane

c)

Nucleus

d)

Vacuole

e)

Cytoplasm

99.

What is the outermost layer of a leaf called?

a)

Epidermis

b)

Cortex

c)

Xylem

d)

Phloem

e)

Stomata

100.

Which structure in a plant leaf is responsible for gas exchange?

a)

Stomata

b)

Petal

c)

Cortex

d)

Chloroplast

e)

Xylem

101.

Which tissue connects and supports body structures?

a)

Connective tissue

b)

Muscle tissue

c)

Nervous tissue

d)

Epithelial tissue

e)

Cardiac tissue

102.

What type of muscle is found in the heart?

a)

Cardiac muscle

b)

Skeletal muscle

c)

Smooth muscle

d)

Striated muscle

e)

Voluntary muscle

103.

Which cells are the primary units of the nervous system?

a)

Neurons

b)

Epithelial cells

c)

Pigment cells

d)

Stem cells

e)

Fibroblasts

104.

What is the function of red blood cells?

a)

Carrying oxygen to tissues

b)

Fighting infections

c)

Producing hormones

d)

Forming clots

e)

Transporting nutrients

105.

Which type of tissue forms the lining of organs?

a)

Epithelial tissue

b)

Nervous tissue

c)

Connective tissue

d)

Muscle tissue

e)

Bone tissue

106.

What is the role of mesoderm in embryonic development?

a)

Giving rise to the skeleton, muscles, and heart

b)

Developing the skin and nervous tissue

c)

Forming the brain and spinal cord

d)

Producing reproductive cells

e)

Absorbing nutrients

107.

What are pigment cells responsible for?

a)

Producing melanin for skin and hair color

b)

Fighting infections

c)

Producing oxygen

d)

Transporting hormones

e)

Absorbing nutrients

108.

What is the primary function of epithelial tissue?

a)

Protecting organs and forming barriers

b)

Producing movement

c)

Transporting blood

d)

Producing enzymes

e)

Forming the skeleton

109.

What is a function of skeletal muscles?

a)

Enabling voluntary body movement

b)

Protecting internal organs

c)

Pumping blood

d)

Absorbing nutrients

e)

Producing hormones

110.

Which tissue stores energy in the form of fat?

a)

Adipose tissue

b)

Epithelial tissue

c)

Muscle tissue

d)

Connective tissue

e)

Nervous tissue

111.

What is the primary function of the Golgi apparatus?

a)

Modifying, packaging, and transporting proteins

b)

Storing water

c)

Producing energy

d)

Replicating DNA

e)

Breaking down waste

112.

Which organelle stores genetic information in eukaryotic cells?

a)

Nucleus

b)

Mitochondrion

c)

Lysosome

d)

Ribosome

e)

Vacuole

113.

What is the role of ribosomes in the cell?

a)

Synthesizing proteins

b)

Transporting nutrients

c)

Breaking down waste

d)

Producing energy

e)

Replicating DNA

114.

Which organelle is referred to as the "powerhouse" of the cell?

a)

Mitochondrion

b)

Ribosome

c)

Nucleus

d)

Lysosome

e)

Golgi apparatus

115.

What is the role of chromosomes in the cell?

a)

Carrying genetic information

b)

Producing proteins

c)

Absorbing nutrients

d)

Synthesizing RNA

e)

Storing energy

116.

What is the basic unit of heredity?

a)

Gene

b)

Protein

c)

Chromosome

d)

Enzyme

e)

Nucleotide

117.

What is a mutation?

a)

A change in the DNA sequence

b)

A process of RNA synthesis

c)

A repair mechanism in cells

d)

A type of allele

e)

A stage in cell division

118.

What does crossing over result in?

a)

Genetic variation during meiosis

b)

Formation of identical cells

c)

Loss of chromosomes

d)

Protein synthesis

e)

DNA repair

119.

What is the role of transcription in genetics?

a)

Copying genetic information from DNA to RNA

b)

Synthesizing DNA from RNA

c)

Breaking down proteins

d)

Transferring amino acids to ribosomes

e)

Assembling codons

120.

What is the complete set of an organism's DNA called?

a)

Genome

b)

Gene pool

c)

Allele

d)

Chromatin

e)

Nucleotide sequence

121.

What are codons?

a)

Sequences of three nucleotides that code for an amino acid

b)

Proteins involved in DNA replication

c)

Cellular organelles for energy production

d)

DNA segments that regulate gene expression

e)

Bases in chromosomes

122.

What is the purpose of translation in cells?

a)

Protein synthesis based on mRNA information

b)

RNA synthesis

c)

DNA replication

d)

Chromosome separation

e)

Genetic recombination

123.

What is a chromosome made of?

a)

DNA and proteins

b)

Lipids and enzymes

c)

RNA and carbohydrates

d)

Sugars and amino acids

e)

Proteins and lipids

124.

What is the function of tRNA in translation?

a)

Carrying amino acids to ribosomes

b)

Copying DNA to RNA

c)

Transporting proteins within the cell

d)

Synthesizing ATP

e)

Generating codons

125.

What is gene therapy used for?

a)

Treating diseases by correcting faulty genes

b)

Producing enzymes

c)

Diagnosing genetic diseases

d)

Regulating immune responses

e)

Synthesizing DNA

126.

What is fertilization?

a)

Fusion of a sperm and an egg to form a zygote

b)

Process of nutrient absorption by the embryo

c)

Division of a zygote into multiple cells

d)

Implantation of an embryo into the uterus

e)

Creation of stem cells

127.

What is the morula?

a)

A solid mass of blastomeres formed by zygote division

b)

A hollow ball of cells

c)

A stage in fetal development

d)

A fertilized egg

e)

A temporary organ during pregnancy

128.

Which organ develops to support the fetus and transfer nutrients from the mother?

a)

Placenta

b)

Allantois

c)

Blastocyst

d)

Chorion

e)

Morula

129.

What is mitosis?

a)

A process of cell division resulting in two identical daughter cells

b)

Reduction of chromosome number in sex cells

c)

Formation of reproductive cells

d)

Fusion of gametes

e)

Growth of embryonic tissues

130.

Which structure provides oxygen and nutrients to the developing fetus?

a)

Placenta

b)

Zygote

c)

Blastula

d)

Germ cells

e)

Stem cells

131.

Which of the following is true about viruses?

a)

They require a host cell for replication

b)

They can replicate independently

c)

They are unicellular organisms

d)

They have a nucleus

e)

They have a cell wall

132.

What is a blastocyst?

a)

A hollow structure formed during early development

b)

The cell formed by fertilization

c)

A solid mass of cells

d)

The organ that supports the fetus

e)

A group of stem cells

133.

What is the main role of the chorion?

a)

Protecting the developing fetus

b)

Producing stem cells

c)

Producing enzymes for digestion

d)

Regulating calcium levels

e)

Absorbing nutrients

134.

What happens during meiosis?

a)

Reduction of chromosome number in reproductive cells

b)

Fusion of gametes

c)

DNA synthesis

d)

Formation of a blastula

e)

Growth of tissues

135.

What are stem cells capable of?

a)

Differentiating into various types of specialized cells

b)

Producing oxygen

c)

Transporting nutrients

d)

Forming the placenta

e)

Protecting the immune system

136.

What are vegetative organs in plants?

a)

Organs supporting growth like roots, stems, and leaves

b)

Flowers and seeds

c)

Reproductive organs

d)

Photosynthetic pigments

e)

Vascular tissues

137.

What is the primary function of leaves in plants?

a)

Carrying out photosynthesis

b)

Storing nutrients

c)

Absorbing water

d)

Anchoring the plant

e)

Transporting sugars

138.

What is the main reproductive organ in flowering plants?

a)

Flower

b)

Leaf

c)

Root

d)

Stem

e)

Cortex

139.

What is a plasmid in bacteria?

a)

A circular piece of DNA

b)

A type of flagellum

c)

An organelle

d)

A viral protein

e)

A nutrient storage unit

140.

What is the function of the ovary in flowers?

a)

Producing and containing ovules

b)

Producing pollen

c)

Absorbing nutrients

d)

Transporting water

e)

Providing support

141.

What is the cortex in plants?

a)

Storage layer in roots and stems

b)

Photosynthetic layer

c)

Protective tissue

d)

Vascular tissue

e)

Meristematic tissue

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