Sexual Reproduction

Q.

Describe the process of fertilization in human beings.

Q.

Why is cross-pollination preferred over self-pollination?

1. The fruits developed after fertilisation are larger.

2. It increases the chances of variation.

3. It takes less time for fertilisation.

4. It makes sure that variations don't occur.

Q. Question 3
Explain what you understand by sexual reproduction.

Q.

Which gland is only found in females?

Q.

Which hormones regulate the growth of metamorphosis in frogs?

1. Adrenaline

2. Insulin

3. Thyroxine

4. Cortisol

Q.

Of both father and mother, who contributes more amount of genetic material to the child?

Q.

State three main differences between asexual and sexual reproduction. [3 MARKS]

Q.

Which type of cell division is prominent in reproductive cells in plants and animals?

1. Mitosis

2. Meiosis

3. Binary Fission

4. Multiple fission

Q.

What are the different parts of stamen and pistil? Show it diagrammatically.

Q. Choose the correct statements from the options below with regard to sexual reproduction.
(i) Sexual reproduction does not always require two individuals.
(ii) Sexual reproduction generally involves gametic fusion.
(iii) Meiosis never occurs during sexual reproduction.
(iv) External fertilization is a rule during sexual reproduction.

1. (i) and (iv)
2. (i) and (ii)
3. (ii) and (iii)
4. (ii) and (iv)

Q. Sexual reproduction involves formation of the male and female gametes by

1. Different individual of the same sex
2. Different individuals of the opposite sex
3. Same individual
4. Both A and B

Q. What are the modes of reproduction ?

1. fragmentation
2. fission
3. sexual
4. all of above

Q. Pollen tube grows from the and reaches the in the ovary where fertilisation takes place.

1. ovule
2. filament
3. anther
4. stigma

Q. Generally growth and reproduction are

1. Mutually exclusive events
2. Mutually inclusive events
3. Either a or b
4. None

Q. State whether the following statements are true or false .
Horowitz showed that the earliest organisms were probably heterotrophs.

1. True
2. False