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Standard XII

Biology

Class Aves

The animal A ...

Question

The animal $A$ which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form $B$ which looks very different from the animal $A .$ The form $B$ then undergoes a change $C$ and gets converted into animal $A .$
$(c)$ Name the breathing organs of $A .$

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Solution

Answer:
Frog $(A)$ mainly breathes by lungs and moist skin.

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The animal A which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form B which looks very different from the animal A. The form B then undergoes a change C and gets converted into animal A.

(a) Name (i) animal A, and (ii) form B.

(b) What is the change C knows as ?

(d) What are the breathing organs of B ?

Q. In which of these animals does the young that hatches out of the egg look very different from the adult animal?
(a) frog
(b) butterfly
(c) mosquito
(d) all of these

Q. The animal

A

which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form

B

which looks very different from the animal

A .

The form

B

then undergoes a change

C

and gets converted into animal

A .

(a)

Name

(i)

animal

A,

and

(i i)

form

B .

Q. The animal

A

which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form

B

which looks very different from the animal

A .

The form

B

then undergoes a change

C

and gets converted into animal

A .

(b)

What is the change C known as

?

A

is an insect which breeds in ponds of stagnant water. The egg of this insect produces a worm like form

B

which is entirely different in appearance from the adult insect. The form

B

undergoes a change

C

and gets converted into insect

A .

The female of insect

A

is a carrier of protozoan

D

which spreads a disease in humans.

(b)

Name another insect which also undergoes change

C .

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Class Aves

Standard XII Biology

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The animal A which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form B which looks very different from the animal A. The form B then undergoes a change C and gets converted into animal A. (c) Name the breathing organs of A.

Answer: Frog (A) mainly breathes by lungs and moist skin.

The animal $A$ which is classified as an amphibian lays eggs in pond water. The hatching of its eggs produces a tailed-form $B$ which looks very different from the animal $A .$ The form $B$ then undergoes a change $C$ and gets converted into animal $A .$
$(c)$ Name the breathing organs of $A .$

Answer:
Frog $(A)$ mainly breathes by lungs and moist skin.