Vidaara.orgClass 12 · Mathematics
CodeVID-M12-WS
Sexual Reproduction in Flowering Plants — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
17 × 1 = 17 marks
1.
The male reproductive part of a flower is the:
- A.Gynoecium
- B.Androecium
- C.Calyx
- D.Corolla
2.
Each stamen consists of a filament and a/an:
- A.Anther
- B.Stigma
- C.Style
- D.Ovary
3.
Pollen grains are produced inside the:
- A.Ovary
- B.Anther
- C.Stigma
- D.Style
4.
The tough outer wall of a pollen grain is made of:
- A.Cellulose
- B.Sporopollenin
- C.Lignin
- D.Cutin
5.
The female reproductive part of a flower is the:
- A.Stamen
- B.Pistil
- C.Petal
- D.Sepal
6.
The part of the pistil that receives pollen is the:
- A.Ovary
- B.Style
- C.Stigma
- D.Funicle
7.
Ovules are found inside the:
- A.Anther
- B.Ovary
- C.Stigma
- D.Filament
8.
The female gametophyte of a flowering plant is the:
- A.Pollen grain
- B.Embryo sac
- C.Anther
- D.Stigma
9.
A typical embryo sac is:
- A.7-celled, 8-nucleate
- B.2-celled
- C.Single-celled
- D.5-celled
10.
Transfer of pollen to the stigma of the same flower is:
- A.Cross-pollination
- B.Self-pollination
- C.Fertilisation
- D.Germination
11.
Pollen reaches the ovule by growing a:
- A.Root
- B.Pollen tube
- C.Shoot
- D.Leaf
12.
Fusion of a male gamete with the egg cell forming the zygote is called:
- A.Triple fusion
- B.Syngamy
- C.Pollination
- D.Dispersal
13.
Fusion of a male gamete with the two polar nuclei forms the:
- A.Zygote
- B.Endosperm (3n)
- C.Pollen grain
- D.Seed coat
14.
The two fusions occurring in flowering plants together are called:
- A.Single fertilisation
- B.Double fertilisation
- C.Self-pollination
- D.Cross-pollination
15.
After fertilisation, the ovary develops into the:
- A.Seed
- B.Fruit
- C.Flower
- D.Root
16.
The maturing of anther and stigma at different times to favour cross-pollination is:
- A.Dichogamy
- B.Apomixis
- C.Parthenocarpy
- D.Polyembryony
17.
Formation of seeds without fertilisation is called:
- A.Parthenocarpy
- B.Apomixis
- C.Syngamy
- D.Pollination
Section B — Challenge / Olympiad (2 marks each)
7 × 2 = 14 marks
18.
Pollen grains survive for thousands of years as fossils mainly because their exine contains:
- A.Sporopollenin, one of the most resistant biological substances
- B.Water
- C.Sugar
- D.Soft cellulose
19.
Double fertilisation is considered unique because it produces both a:
- A.Zygote and a triploid endosperm
- B.Two zygotes
- C.Two pollen grains
- D.Root and a shoot only
20.
Brightly coloured, scented flowers with nectar are usually adapted for pollination by:
- A.Insects (and birds)
- B.Wind only
- C.Water only
- D.No agent
21.
The endosperm is important to the developing seed because it:
- A.Provides nourishment to the embryo
- B.Forms the seed coat
- C.Becomes the fruit wall
- D.Makes pollen
22.
Cross-pollination promotes variation in offspring because it brings together:
- A.Genes from two different parent plants
- B.Only one parent's genes
- C.No genes
- D.Identical genes
23.
If the synergids guide the pollen tube into the embryo sac, removing them would most likely:
- A.Hinder the entry of the male gametes
- B.Speed up fertilisation
- C.Form more pollen
- D.Make the fruit larger
24.
Apomixis is useful in agriculture because the seeds it produces are:
- A.Genetically identical to the parent, preserving hybrid traits
- B.Always seedless
- C.Different from the parent
- D.Unable to germinate
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Androecium
- (A) Anther
- (B) Anther
- (B) Sporopollenin
- (B) Pistil
- (C) Stigma
- (B) Ovary
- (B) Embryo sac
- (A) 7-celled, 8-nucleate
- (B) Self-pollination
- (B) Pollen tube
- (B) Syngamy
- (B) Endosperm (3n)
- (B) Double fertilisation
- (B) Fruit
- (A) Dichogamy
- (B) Apomixis
Section B — Challenge / Olympiad (2 marks each)
- (A) Sporopollenin, one of the most resistant biological substances
- (A) Zygote and a triploid endosperm
- (A) Insects (and birds)
- (A) Provides nourishment to the embryo
- (A) Genes from two different parent plants
- (A) Hinder the entry of the male gametes
- (A) Genetically identical to the parent, preserving hybrid traits
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