What is required for transport of male gametes in bryophyte and pteridophyte?

The correct option is D

Water

The correct option is D:

Explanation for the correct option:

1. In bryophytes and pteridophytes, the male gametes are produced by structures called antheridia.
2. The male gametes are free-swimming sperm cells that require water to get transported to the female gamete enclosed in archegonia.

Explanation for the incorrect options:

Option A:

1. The transfer of gametes through wind is called anemophily.
2. All the gymnosperms are anemophilous.
3. Most conifers and around 12-13% of all the flowering plants are wind-pollinated.

Option B:

1. The transfer of gametes through insects is known as entomophily.
2. Honey bees, moths, and butterflies are common pollinating agents.
3. Around 75% of all flowering plants on earth are pollinated by insects.

Option C:

1. The transfer of gametes by birds is known as ornithophily.
2. As the bird seeks nectar, the pollen sticks to its head and neck and is then transferred to the next flower.
3. Many members of the pea, orchid, and cactus family are pollinated by birds.

Final answer: Water is required for the transport of male gamete in bryophytes and pteridophytes.