Question

Q1.Why do fish and frogs lay eggs in hundreds whereas a hen lays only one egg at

a time?

Q2. What purpose does the tail in a sperm serve?

Q3. Explain the importance of reproduction in organisms.

Q4. Differentiate between internal fertilisation and external fertilisation.

Q5. Choose the most appropriate answer.

(a) Internal fertilisation occurs:

(i) in female body. (ii) outside female body.

(iii) in male body. (iv) outside male body

{b}After fertilisation, the resulting cell which gives rise to a new individual is the:

(i) embryo (ii) ovum (iii) foetus (iv) zygote​
I need ans in depth plz​

Answer 1

Answer: Q1}Organisms having internal fertilization, like a hen, produce one egg at a time. This is so because here there is less chance of failure of fusion between male and female gamete.

Q2}Tail helps the sperm to move forward instead of moving in circles.  

Q3}Reproduction is essential for the continuation of a species. It ensures the continuation of similar kinds of individuals, generation after generation.

Q4} the union of male and female gametes in external fertilization occurs outside the female body while the union of male and female gametes in internal fertilization occurs inside the female body.

Q5}(a)(i) in a female body

     (b)(iv) zygote​