Winged pollen grains are present in:

1 Mustard
2. Cycas
3. Mango
4. Pinus

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

Dioecy in plants prevents:

(1) Autogamy but not geitonogamy

(2) Geitonogamy but not autogamy

(3) Both autogamy and geitonogamy

(4) Neither autogamy nor geitonogamy

Attractants and rewards are required for:

1. Entomophily

2. Hydrophily

3. Cleistogamy

4. Anemophily

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:

1. Bee

2. Wind

3. Bat

4. Water

A dioecious flowering plant prevents both:

1. Autogamy and geitonogamy

2. Geitonogamy and xenogamy

3. Cleistogamy and xenogamy

4. Autogamy and xenogamy

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

(1) water

(2) insects or wind

(3) birds

(4) bats