Assignment I
1. Name the hormone, secretion of which is responsible for dramatic changes in appearance in
girls when they approach 10-12 years of age.
2. The organisms formed by asexual reproduction are considered as clones. Why? State the
advantage of sexual reproduction over asexual reproduction.
3. What is the effect of DNA copying which is not perfectly accurate on the reproduction
process?
4. How does the process of budding differ from the process of spore formation?
5. Name the type of asexual reproduction in : (a) Planaria (b) Rhizopus (iii) Spirogyra (iv) Hydra
6. With the help of a diagram only show regeneration in Planaria. Regeneration is not possible in
all types of animals. Why?
7. How does the process of seed germination take place in plants? Describe in brief.
8. Name the sex hormones secreted by male and female sex organs in human beings. State one
function of each.
9. State the mode of reproduction in following organisms : Earthworm, Frog, Rhizopus,
Plasmodium.
10. State in brief any two functions of copper-T used by some women.
11. In what respect is the human male gamete different from the female gamete?
12. What is reproduction? What are its two types? Which one of the two confers new
characteristics on the offsprings and how?
13. What is binary fission? Draw a diagram to show binary fission in Amoeba.
14. What is regeneration? State a reason why a more complex organism cannot give rise to new
individuals through this method.
15. Name the male and female gametes in animals. What is fertilisation and where does it take
place in human females?
16. What is reproduction? Mention the importance of DNA copying in reproduction.
17. Mention the information source of making proteins in the cell. What is the basic event in
reproduction?
18. Name one sexually transmitted disease each caused due to bacterial infection and viral
infection. How can these be prevented?
1. Name the hormone, secretion of which is responsible for dramatic changes in appearance in
girls when they approach 10-12 years of age.
2. The organisms formed by asexual reproduction are considered as clones. Why? State the
advantage of sexual reproduction over asexual reproduction.
3. What is the effect of DNA copying which is not perfectly accurate on the reproduction
process?
4. How does the process of budding differ from the process of spore formation?
5. Name the type of asexual reproduction in : (a) Planaria (b) Rhizopus (iii) Spirogyra (iv) Hydra
6. With the help of a diagram only show regeneration in Planaria. Regeneration is not possible in
all types of animals. Why?
7. How does the process of seed germination take place in plants? Describe in brief.
8. Name the sex hormones secreted by male and female sex organs in human beings. State one
function of each.
9. State the mode of reproduction in following organisms : Earthworm, Frog, Rhizopus,
Plasmodium.
10. State in brief any two functions of copper-T used by some women.
11. In what respect is the human male gamete different from the female gamete?
12. What is reproduction? What are its two types? Which one of the two confers new
characteristics on the offsprings and how?
13. What is binary fission? Draw a diagram to show binary fission in Amoeba.
14. What is regeneration? State a reason why a more complex organism cannot give rise to new
individuals through this method.
15. Name the male and female gametes in animals. What is fertilisation and where does it take
place in human females?
16. What is reproduction? Mention the importance of DNA copying in reproduction.
17. Mention the information source of making proteins in the cell. What is the basic event in
reproduction?
18. Name one sexually transmitted disease each caused due to bacterial infection and viral
infection. How can these be prevented?
