What are the advantages of sexual reproduction over asexual reproduction?
5. What are the functions performed by the testis in human beings?
6. Why does menstruation occur?
7. Draw a labelled diagram of the longitudinal section of a flower.
8. What are the different methods of contraception?
9. How are the modes for reproduction different in unicellular and
multicellular organisms?
0. How does reproduction help in providing stability to populations of species?
what could be the reasons for adopting contraceptive methods?
Answers
Answer:
What are the advantages of sexual reproduction over asexual reproduction ?
In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population.
The new formed individual has characteristics of both the parents.
Variations are more viable in sexual mode than in asexual one.
What are the functions performed by the testis in human beings?
The testicles are the male gonads — the primary male reproductive organs. They have two, very important functions that are very important to the male reproductive system: they produce gametes, or sperm, and they secrete hormones, primarily testosterone.
6. Why does menstruation occur?
A period happens because of changes in hormones in the body. Hormones are chemical messengers. The ovaries release the female hormones estrogen and progesterone . These hormones cause the lining of the uterus (or womb) to build up.