WorksheetsSexual Reproduction in Flowering Plants
Total questions: 20
Worksheet time: 10mins
In angiosperm plants, which of the following represents the female gametophyte?
Ovary
Ovule
Embryo sac
Pistil
Main function of the tapetum is to
provide nutrition to developing pollen grains
provide protection to anther
divide and form pollen grains
facilitate entry of male gametes into the embryo sac
Each microsporangium has four types of wall layers. Which one of the following is the correct combination of wall layers?
Epidermis
Endodermis
Middle layers
Tapetum
Epidermis
Endothecium
Middle layers
Tapetum
Epidermis
Endometrium
Middle layers
Tapetum
Epidermis
Endodermis
Parietal cell layers
Tapetum
Below are four statements about ANTHER. Find the incorrect statement.
Anther may be single lobed or two lobed
A bilobed anther is tetrasporangiate
Microsporangium develops from hypodermal cell called archesporial cell
Each anther lobe bears one microsporangium
The given diagram represents anatropous ovule. Which of the following labels (A-D) is correct?
A- Hilum
B- Funicle
C- Micropyle
D- Cotyledon
A- Hilum
B- Placenta
C- Micropyle
D- Embryo
A- Funicle
B- Hilum
C- Micropyle
D- Embryo
A- Hilum
B- Funicle
C- Micropyle
D- Embryo sac
Which of the following is the correct composition of EGG APPARATUS?
Egg and Polar nuclei
Egg and antipodals
Egg and Synergids
Egg, Synergids and Polar nuclei
During microsporogenesis, the diploid microspore mother cell (MMC) divides to form microspores. Which of the following statements is true?
MMC undergoes one mitotic division to form 4 haploid pollen grains
MMC undergoes one mitotic division and one meiotic division to form 4 haploid pollen grains
MMC undergoes one meiotic division to form 4 haploid pollen grains
MMC undergoes two mitotic divisions to form 4 haploid pollen grains
Given below are 4 technical terms associated with outbreeding devices in angiosperms along with their meaning. One of them is incorrect. Find it.
Herkogamy - Mechanical barrier
Dichogamy- Maturation of anther and pistil at different time
Self incompatibility- genetic mechanism preventing fertilisation within same flower
Dioecism- bisexual flower
The most common embryo sac in angiosperms is monosporic type having 8 nuclei but 7 celled. Which of the following statements is correct one?
An embryo sac develops from single megaspore mother cell, so called monosporic.
Formation of Polar nuclei made the embryo sac 7 celled
Consecutive four free nuclear mitotic divisions in the functional megaspore results into 8 nuclei.
One nucleus of the antipodals degenerates to give rise to 7 celled condition
This is L.S. of a pistil. Which of the following is incorrect label?
A- Pollen tube
E- Synergid
B- Antipodals
D- Egg cell
C- Polar nuclei
D- Egg cell
B- Synergid
E- antipodal
Which of the following is not an advantage of Self-pollination?
Assured pollination
Plants need not produce large number of pollen grains
New traits are easily introduced
Produces homozygous progeny
To explain Geitonogamy, one of the following statements do not apply. Find the statement.
It involves transfer of pollen from one flower to stigma of another flower within the same plant
Such flowers are usually bisexual
It requires external pollinating agent
It is physically a cross pollination but genetically similar to self pollination
Which of the following you will find in Cleistogamous flowers?
Flowers open only at maturity
Equal chance for self and cross pollination
Rare chance for Cross pollination
Involves pollinating agents
Self pollination may have disadvantages. Which of the following is an advantage?
Harmless and useless characters are eliminated naturally
It increases recessive traits regularly
It increases homozygosity
It reduces vigour and vitality
Type of cross pollination is named after the agent. Which of the following is a correct match?
a) Entemophily- wind pollination
b) Anemophily- insect pollination
c) Ornithophily- snail pollination
d) Chiropterophily- bat pollination
a)
b)
c)
d)
Which of the following is not a characteristic of Anemophilous flower?
Flowers are odourless, nectarless and colourless
Calyx and corolla are reduced or absent
Flowers are large and conspicuous
Pollen grains are small, smooth, non sticky and light
The figure shows L.S. of an embryo of grass (monocot plant) marked A-G. Select the option with the correct labeling.
A- Shoot apex
B- Coleoptile
C-Epiblast
E- Coleoptile
F- Root cap
G- Radicle
A- Scutellum
D- Epiblast
G- Coleorrhiza
B- Coleoptile
C- Shoot apex
F- Coleorrhiza
This is structure of a typical monocot seed (maize) labeled A-F. Among the following options, one is incorrect label. Find it.
D- Coleoptile
F- Coleorrhiza
B- Scutellum
C- Endosperm
A- Aleurone layer
B- Endosperm
C- Scutellum
E- Plumule
Perisperm is
outer covering of seed
outer covering of stem
found in the bark
residual persistent nucellus
After fertilization, there is a change in the floral parts. Find the incorrect change. Exceptions may not be considered.
Egg to Zygote to Embryo
Ovule to fruit
Central cell to Endosperm
Outer integument to testa
