what purpose does the tail in a sperm serve?
how many chromosomes are present in the nucleus of single sperm ?
pl.s answer soon
what are the role of iodine in metamorphosis.??
Explain why the chance of fertilisation in humans is restricted to only a few days each month.
what is a red data book?
what is mitochondria? Explain why sperm contains large number of mitochondria?
what is the young one of a butterfly called?
give one word:
an animal where fertilization is internal but develpment occurs outside the body
answer the following:
1. a female ovary produces 1 ovum every month. this impiles that not more than 1 zygote can be formed at a time. how are twins produced then? also find out why some twins are identical and some are not?
2. why do frogs produce large number of eggs? eplain the life cycle of frog.
3. how is an egg cell different from egg formed after fertilisation in some animals?
What is reproduction in brief ?
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