Sexual Reproduction in Flowering Plants — Page 7 | NEET Biology

Q61

Seed coat is not thin, membranous in

A Coconut

B Groundnut

C Gram

D Maize

Correct Answer

Option A

Solution

(a) Coconut has a thick, hard seed coat (testa) protecting the embryo.

Q62

Function of filiform apparatus is to

A Recognize the suitable pollen at stigma

B Stimulate division of generative cells

C Produce nectar

D Guide the entry of the pollen tube

Correct Answer

Option D

Solution

(d) Filiform apparatus guides the pollen tube entry into a synergid.

Q63

Male gametophyte with least number of cells is present in

A Pteris

B Funaria

C Lilium

D Pinus

Correct Answer

Option C

Solution

(c) Male gametophyte of angiosperms (Lilium) has only 2-3 cells — the fewest.

Q64

Geitonogamy involves

A fertilization of a flower by the pollen from another flower of the same plant.

B fertilization of a flower by the pollen from the same flower.

C fertilization of a flower by the pollen from a flower of another plant in the same population.

D fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.

Correct Answer

Option A

Solution

(a) Geitonogamy: transfer of pollen from one flower to another flower on the same plant.

Q65

Filiform apparatus is characteristic feature of

A Nucellar embryo

B Aleurone cell

C Synergids

D Generative cell

Correct Answer

Option C

Solution

(c) Synergids have the filiform apparatus.

Q66

Which of the following are the important floral rewards to the animal pollinators?

A Nectar and pollen grains

B Floral fragrance and calcium crystals

C Protein pellicle and stigmatic exudates

D Colour and large size flower

Correct Answer

Option A

Solution

(a) Nectar and pollen grains are the usual floral rewards for pollinators.

Q67

The hilum is a scar on the seed where

A Fruit, where it was attached to pedicel

B Fruit, where style was present

C Seed, where micropyle was present

D Seed, where funicle was attached

Correct Answer

Option D

Solution

(d) Hilum is the scar on the seed where the funicle was attached.

Q68

Which one of the following statements is not true about honey?

A Pollen grains of some plants cause severe allergies and bronchial afflictions in some people

B The flowers pollinated by flies and bats secrete foul odour to attract them

C Honey is made by bees by digesting pollen collected from flowers

D Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups

Correct Answer

Option C

Solution

(c) Honey is produced from nectar, not pollen.

Q69

Which one of the following may require pollinators, but is genetically similar to autogamy?

A Xenogamy

B Apogamy

C Cleistogamy

D Geitonogamy

Correct Answer

Option D

Solution

(d) Geitonogamy is genetically similar to autogamy as pollen from the same plant is used.

Q70

Which of the following statements is not correct about pollination?

A Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

B Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers

C Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.

D Some reptiles have also been reported as pollinators in some plant species.

Correct Answer

Option A

Solution

(a) Incompatible pollen grains do not germinate on the stigma — only compatible pollen germinates.