Reproduction

Q. What is incorrect about mitosis?

1. Sexual reproduction occurs by mitosis
2. It is not the main reason behind genetic variation
3. DNA duplication is involved
4. Exact copies are made

Q. What is meiosis?

1. Cell division used for asexual reproduction
2. Cell division used for growth and development
3. Cell division to reduce the number of chromosomes to half
4. Cell division to maintain the number of chromosomes

Q. What is the use of meiosis?

1. None of the above
2. To help organism cope with harsh environment
3. To produce exactly same set of chromosomes
4. To produce two different haploid set of chromosomes

Q. What is meiosis?

1. A type of cell division in which the number of chromosomes is halved in the daughter cells
2. A type of cell division used to produce gametes
3. None of these
4. A type of cell division in which the number of chromosomes remains same in daughter cells

Q. State true or false.
Reproduction is essential for the survival of both - a human being and a bacterium.

1. True
2. False

Q. Select the correct statement about mitosis.

1. The daughter cells usually exactly resemble the parent cell and each other
2. The daughter cells are usually very different from the parent cell but exactly like each other
3. The daughter cells are usually very different from the parent cell and each other
4. The daughter cells are usually exactly like the parent cell but very different from each other

Q. What are the changes seen in girls at the time of puberty?

[2 Marks]
[NCERT]
[Secondary Sexual Characters]

Q.

Which of the following statement is correct about sexual reproduction?

1. Sexual reproduction takes place only in plants
2. Meiosis produces gametes for sexual reproduction
3. Only multicellular organisms undergo sexual reproduction
4. Sexual reproduction takes place in all the organisms

Q. Which of the following cells can be a result of meiotic cell division?

1. Zygote
2. Hair Cells
3. Pollen Grains
4. Red Blood Cells

Q. Mitosis cannot result in:

1. Asexual reproduction
2. Growth
3. Repair
4. Sexual reproduction