Question

A Answer the following questions.
1. What is the need for reproduction?
2. Define mammals. What are warm-blooded animals?
3. Explain the structure of an egg with the help of a diagram.
4. What are the different stages of development in birds?
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Answer 1

Answer:

1.Reproduction is an important survival strategy that is used to ensure the continuation of a species. Hence, without reproduction, life would cease to exist. Reproduction can primarily be classified into two types – sexual and asexual.

2.Warm-blooded are those animal species which can maintain a body temperature higher than their environment. In particular, homeothermic species maintain a stable body temperature by regulating metabolic processes.

  DEFINE MAMMALS :warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young, and (typically) the birth of live young.

3.A high-quality egg has only a small air cell. The yolk is well-centered in the albumen and is surrounded by the vitelline membrane, which is colorless. ... On opposite sides of the yolk are two, twisted, whitish cord-like objects known as chalazae. Their function is to support the yolk in the center of the albumen.

• 4. HATCHLING. A bird just out of the egg. ...

• NESTLING. A bird that remains in the nest until it is able to fly.

• CHICK. A young bird that leaves the nest soon after hatching and typically walks or hops near its family group until it is able to fly.

• FLEDGLING. ...

• JUVENILE. ...

• IMMATURE. ...

• ADULT.

Answer 2

Explanation:

1.Reproduction is an important survival strategy that is used to ensure the continuation of a species. Hence, without reproduction, life would cease to exist. Reproduction can primarily be classified into two types – sexual and asexual.

2.a warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young, and (typically) the birth of live young

3 at the above.

4.GLOSSARY OF BIRDS' LIFE STAGES

HATCHLING. A bird just out of the egg. ...NESTLING. A bird that remains in the nest until it is able to fly.CHICK. A young bird that leaves the nest soon after hatching and typically walks or hops near its family group until it is able to fly.FLEDGLING. ...JUVENILE. ...IMMATURE. ...ADULT.