Class Amphibia

Q.

Which of the following biological groups is dependent on photosynthesis for its survival?

1. All of the above

2. Vertebrates

3. Mammalia

4. Plants

Q. Identify the organism from the given description.

1. Poikilotherm
2. Moist skin present
3. Neck absent
4. Digits without claws
3. Eyes are prominent with eyelids

1. Electric ray
2. Salamander
3. Snake
4. Sea horse

Q. What is the advantage of having the four-chambered heart?

Q. Three chambered heart of frog is not as efficient as four chambered human heart because

1. Ventricle does not pump blood properly
2. Oxygenated and deoxygenated bloods mix up
3. It does not hold enough blood
4. Heart muscles are not strong

Q. Anus opens into a central chamber in vertebrates called

1. Rectum
2. Caecum
3. None of the above
4. Cloaca