Reproduction in plants

 

Reproduction in plants

1. Which of the following plant reproduces by leaf

a) Agave

b) Bryophyllum

c) Gladiolus

d) Potato

 

2. Advantage of cleistogamy

a) Higher genetic variability

b) More vigorous offspring

c) No dependence on pollinators

d) Vivipary

 

3. An example for edible underground stem is

a) Carrot

b) Groundnut

c) Sweet potato

d) Potato

 

4. Pollen tablets are available in the market for

a) invitro fertilization

b) Breeding programmes

c) supplementing food

d) ex situ conservation

 

5. Geitonogamy involves

a) Fertilization of a flower by pollen from another flower of a same plant

b) Fertilization of a flower by pollen of the same flower

c) Fertilization of a flower by pollen from a flower of another plant in a same population

d) Fertilization of a flower by the pollen from a flower of another plant belongs to distant population.

 

6. Which one of the following generates new genetic combinations leading to variations?

a) vegetative reproduction

b) parthenogenesis

c) Sexual reproduction

d) Nucellar polyembryony

7. Functional megaspore in angiosperm develops into an

a) endosperm

b) Embryo sac

c) embryo

d) ovule

 

8. Which of the statement is not true.

a) Pollen grain of many species cause severe allergies

b) Stored pollen in liquid nitrogen can be used in crop breeding programmes

c) Tapetum helps in the dehiscence of anther

d) Exine of pollen grains is made up of sporopollenin

 

9) When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is

a) pentaploidy

b) diploidy

c) triploidy

d) tetraploidy

 

10) Which one of the following pairs of plant structures has haploid number of chromosomes?

a) Egg nucleus and secondary nucleus

b) Megaspore mother cell and antipodal cells

c) Egg cell and and antipodal cells

d) Nucellus and antipodal cells

 

11) The arrangement of nuclei in a normal embryo sac in the dicot plant is

a) 2 + 4 + 2

b) 3 + 2 + 3

c) 2 + 3 + 3

d) 3 + 3 + 2

 

12) Wind pollinated flowers are

a) Small, producing nectar and dry pollen

b) small, brightly colored, producing large number of pollen grains

c) small, producing large number of pollen grains

d) large, producing abundant nectar and pollen

 

13) Function of filiform apparatus is to

a) recognize the suitable pollen at stigma

b) stimulate division of generative cell

c) produce nectar

d) guide the entry of pollen tube

 

14) The coconut water from tender coconut represents

a) endocarp

b) fleshy mesocarp

c) free nuclear proembryo

d) free nuclear endosperm

 

15) Pollination in water hyacinth and water lily is brought about by the agency of

a) insects or wind

b) birds

c) bats

d) water

 

16) Perisperm differs from endosperm in

a) being haploid tissue

b) having no reserve food

c) being a diploid tissue

d) its formation by fusion of secondary nucleus with several sperms

 

17) Male gametes in angiosperms are formed by the division of

a) microspore mother cell

b) microspore

c) generative cell

d) vegetative cell

 

18) In a type of apomixes known as adventives polyembryony, embryo develop directly

from the

a) synergids or antipodals in an embryo sac

b) nucellus or integuments

c) zygote

d) accessory embryo sac in the ovule

 

19) In a cereal grain the single cotyledon of the embryo is represented by

a) coleorhizae

b) scutellum

c) prophyll

d)coleoptiles

20) An ovule which becomes curved so that the nucellus and embryo sac lie at right angles

to the funicle is

a) camylotropous

b) anatropous

c) orthotropous

d) hemianatropous

 

21) Endosperm is formed during the double fertilization by

a) two polar nuclei and one male gamete

b) one polar nuclei and one male gamete

c) ovum and male gametes

d) two polar nuclei and two male gametes