Sexual Reproduction in Flowering Plants

Flowers are unisexual in

1. China rose
2. onion
3. pea
4. cucumber.

Coconut water from a tender coconut is

1. innermost layers of the seed coat
2. degenerated nucellus
3. immature embryo
4. free nuclear endosperm.

Which one of the following fruits is parthenocarpic?

1. Jackfruit
2. Banana
3. Brinjal
4. Apple

Male gametophyte in angiosperms produces

1. single sperm and two vegetative cells
2. three sperms
3. two sperms and a vegetative cell
4. single sperm and a vegetative cell.

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

1. Floral fragrance and calcium crystals
2. Protein pellicle and stigmatic exudates
3. Colour and large size of flower
4. Nectar and pollen grains

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

1. Apogamy
2. Cleistogamy
3. Geitonogamy
4. Xenogamy

Which one of the following statements is not true?

1. The flowers pollinated by flies and bats secrete foul odour to attract them.
2. Honey is made by bees by digesting pollen collected from flowers.
3. Pollen grains are rich in nutrients and they are used in the form of tablets and syrups.
4. Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.

Transmission tissue is characteristic feature of

1. dry stigma
2. wet stigma
3. hollow style
4. solid style.

Geitonogamy involves

1. fertilization of a flower by the pollen from another flower of the same plant
2. fertilization of a flower by the pollen from the same flower
3. fertilization of a flower by the pollen from a flower of another plant in the same population
4. fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.

Pollen tablets are available in the market for

1. in vitro fertilization
2. breeding programmes
3. supplementing food
4. ex situ conservation.