Question

Angiosperms have dominated the land flora primarily because of their

• A. Property of producing large number of seeds
• B. Nature of self pollination
• C. Domestication by man
• D. Power of adaptability in diverse habitat

Answer 1

The correct option is D

Power of adaptability in diverse habitat

The correct option is D:

Explanation of the correct option:

Option D:

The following adaptions enabled angiosperms to spread to diverse forms.

1. They are highly evolved plants well adapted to extreme conditions.
2. Xylem cells are modified as vessels and tracheids for better conduction of water.
3. Roots are modified into taproots, fibrous roots, adventitious roots, pneumatophores, etc., according to habitat.
4. They have highly evolved sex organs. Sporphylls are organized into flowers that are colored and modified to attract pollinators.
5. Their seeds are more protected as they are enclosed inside a fruit.

Explanation of the incorrect option:

Option A:

1. Angiosperms have highly evolved sex organs.
2. Their seeds are enclosed within the fruit.

Option B:

1. Sexual reproduction is the dominant form of reproduction in flowering plants.
2. Self-pollination is not a form of reproduction in them.

Option C:

Men domesticated only a few angiosperms which are adapted to their habitat.

Final answer: Angiosperms have dominated the land flora primarily because of their power of adaptability in diverse habitats.