Angiosperms do not need water for fertilization. why? a) flagellated sperm travel to the ovary inside the pistil b) pollen stays inside the cone scales to fertilize eggs c) a pollen tube grows from the pollen grain into the ovary d) the sporophytes grow directly from the gametophytes

The answer is c) a pollen tube grows from the pollen grain into the ovary.

Pollen tube is used to transport pollen from the stigma of a flower to the ovary. Actually, pollen begins to grow into pollen tube when lands on the stigma. It grows until it reaches an ovule which is inside the ovary. This way it is secured that a nucleus of pollen will fuse with a nucleus of the ovule and that fertilization will occur.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.