Question

1. What are two modes of reproduction ?
2. Name the process that is essential for continuity of species.
3. What is fertilization ?
4. Give two examples of external fertilization .
5. Why do animals like fish and frog lays eggs in large no. ?
6. What is embryo ?

Answer 1

αnswers :-

1. What are two modes of reproduction ?

answer -

• The sexual and asexual reproduction are two types of reproduction in animals.

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2. Name the process that is essential for continuity of species.

answer -

• Reproduction is the process that is essential for continuity of species.

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3. What is fertilization ?

answer -

• Fertilization may be defined as a process of the fusion of male and female gametes , sperm and egg respectively.

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4. Give two examples of external fertilization .

answer -

• The fish and frog are the two examples of animals in which external fertilization takes place.

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5. Why do animals like fish and frog lays eggs in large no. ?

answer -

• Animals like fish and the frog lay eggs in large no. because most of eggs are not fertilized due to water movement, wind and rainfall.  

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6. What is embryo ?

answer -

• An embryo may be defined as the developed zygote because of fertilization. It is the developing structure for the first eight weeks.

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Answer 2

Answer:

1. Two modes of reproduction are as follows:

* Asexual Reproduction

* Sexual Reproduction

2. Reproduction is the process essential for continuity of species.

3. Fusion of male gametes with female gametes is known as Fertilisation.

4. Following are the two examples for external fertilization:

* Frog

* Fish