Question

Find out the false statement

• A. Aves are warm-blooded, egg laying and have a four-chambered heart
• B. Aves have feather-covered body, forelimbs are modified into wings and breathe through lungs
• C. Most of the mammals are viviparous
• D. Fishes, amphibians and reptiles are oviparous

Answer 1

The correct option is D

Fishes, amphibians and reptiles are oviparous

The correct option is option D

The explanation for the correct option:

1. Females lay fertilized/unfertilized eggs in oviparous organisms.
2. The growth of the zygote takes place outside the female’s body.
3. Examples are All birds, most reptiles, egg-laying mammals, and some fishes and amphibia.
4. Fishes that are not oviparous are Sharks, and stingrays.
5. Amphibia that are not oviparous are a few species of frog-like Nectophrynoides, Nimba toad, and salamanders.
6. A lizard like Zootoca vivipara, and Phrynosomatidae lizard is a reptile and it is not oviparous.

The explanation for the incorrect option:

Option A

1. Class Aves contain birds.
2. They are warm-blooded vertebrates.
3. Their forelimbs are modified into wings.
4. Their hind limbs are adapted for walking, grasping, and swimming.
5. They are oviparous means they lay eggs.
6. The four-chambered heart is present in Aves and Mammalia.
7. Aves do contain lungs with air sacs, which help in increasing the efficiency of respiration.

Option B

1. Class Aves contain birds.
2. The characteristic feature of Aves is their body is covered by feathers.
3. Their forelimb is modified into wings which help in flying.
4. Their hind limbs are adapted for walking, grasping, and swimming.
5. Birds respire through the lungs and contain air sacs which help in increasing the efficiency of respiration.

Option C

1. Viviparous animals do not lay eggs but instead, give birth to young ones.
2. The growth of the zygote takes place inside the female’s body.
3. Viviparity help to protect the young ones from stressful environment.
4. Example - All Mammals except for egg-laying mammals.
5. Most mammals are viviparous and few are oviparous animals.

Final answer: Not all fishes, amphibians, and reptiles are oviparous is a false statement.