Question

Mention the site where syngamy occurs in amphibians and reptiles respectively.

Answer 1

Answer:

In amphibians, syngamy occurs in water outside the body of the organism (external fertilisation and external development). In reptiles, syngamy occurs inside the body of the female (internal fertilisation and external development).

Answer 2

MASTURBATION CYCLE:

1. It occurs in primates (monkeys, apes and human beings) only.

2. This cycle consists of Masturbation phase, proliferative phase and the secretory phase.

3. Blood flows in the last few days of this cycle.

4. The broken endometrium is passed out during Masturbation.

5. Sex urge is not increased during menstruation.

6. Female does not permit copulation during Masturbation phase of the cycle.

OESTROUS CYCLE:

1. It occurs in non-primates such as cows, dogs, etc.

2. It consists of a short period of oestrous or heat (e.g., 12-24 hours in cow) followed by anoestrous or passive period.

3. Blood does into flow in this cycle.

4. The broken endometrium is reabsorbed.

5. Sex urge is increased during oestrous period.

6. Female permits copulation only during oestrous period.

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