Question

____this animal lays eggs as reptiles but has mammary glands and hair on the skin like mammals-
A) Duckbill
B) Peripatus
C) Bear
D) Lungfish

Answer 1

There are many organisms which are considered as the connecting link between two different phyla.This shows an important morphological and anatomical evidence of evolution.

Complete Answer:
Duckbill or duck billed platypus is an example of a connecting link between the reptiles and mammals. They are small, shy animals having a flattened head and body which help them in gliding through the water. They have dark brown fur on top while tan on their bellies. These characters repel water to keep them warm and dry even after hours of swimming.
The head and body of duck-billed platypus can grow up to 15 inches and its tail is about 5 inches long. Their snout is the most remarkable feature. It looks like a duck's bill, the feature responsible for its name. It might look hard but is actually quite soft, it is covered with thousands of receptors used for detection of prey. Male platypus are venomous, on the heels of their rear feet, they have sharp stingers used to deliver a strong toxic blow at any foe. Platypus prefer to live alone, they spend most of their time sleeping or eating. According to scientists, these fascinating creatures are the earliest relatives of modern mammals. They first evolved more than 112 million years ago, i.e. before the extinction of the dinosaurs.

Thus, the correct answer is option A. Duckbill.

Note: The organism can lay eggs similar to the reptiles. They have mammary glands and hair on the skin which is the characteristic feature of the mammals. They are the connecting link between reptiles and mammals.