Answer:
Steps are given below.
1) Pollen lands on the stigma of the flower.
2) A pollen tube grows down through the style to the ovary.
3) A sperm cell fuses with an egg in the ovule.
Explanation:
First the pollens fall from anther of the male part on the stigma of the female part of the flower. After that, the pollen reached to the ovary through pollen tube. Then the sperm cells of male combine with the egg of female forming a zygote (seed).
All of the chemical reactions are within an organism is known as METABOLISM
Answer:
Explanation:
well tricky question, I think they heat up to go through the thic layer of the atmosphere. Thats a good Question