Sexual Reproduction in Animals

Q. Assertion: Sexual reproduction results in offspring that are not identical to the parents or amongst themselves.
Reason: It is an elaborate, complex and slow process

1. If both assertion and reason are true and the reason is the correct explanation of assertion.
2. If both assertion and reason are true but the reason is not the correct explanation of assertion.
3. The assertion is true but the reason is false.
4. Both the assertion and reason are false.

Q.

The correct sequence of different phases of an organism is

1. Vegetative phase - Senescence phase - Reproductive phase

2. Juvenile phase - Reproductive phase - Maturity phase

3. Juvenile phase - Maturity Phase - Old age

4. Vegetative phase - Old age - Senescence phase

Q. One of the following is a characteristic of sexual reproduction :

1. Regeneration
2. Zygote not formed
3. Meiosis present
4. Budding

Q. Match the following.

$\begin{array}{cc}\text{(A) Endogamy}& \text{(I) Cross fertilization}\\ \text{(B) Exogamy}& \text{(II) Self fertilization}\\ \text{(C) Isogamy}& \text{(III) Fusing gametes are different in form, size structure and behaviour.}\\ \text{(D) Sexual reproduction}& \text{(IV) Fusing gametes are similar morphologically}\end{array}$

1. (A) – (III), (B) – (I), (C) –(IV), (D) –(II)
2. (A) – (II), (B) – (I), (C) –(IV), (D) –(III)
3. (A) – (IV), (B) – (I), (C) –(III), (D) –(II)
4. (A) – (I), (B) – (II), (C) –(III), (D) –(IV)

Q. Select T and F for true and false statements respectively.
i) Birds living in nature lay eggs seasonally.
ii) Birds in captivity are made to lay eggs throughout the year.
iii) Captive birds laying eggs is related to reproduction.
iv) The females of placental mammals show cyclical changes in the activities of ovaries but have steady hormones during the reproductive phase.

1. i-T, ii-T, iii-F, iv-F
2. i-T, ii-F, iii-F, iv-T
3. i-T, ii-T, iii-T, iv-F
4. i-T, ii-T, iii-T, iv-T