Question

Choose the correct answers from the alternatives given. Which of the following groups evolved from reptiles?
(a) Amphibians and birds
(b) Amphibians and mammals
(c) Birds and mammals
(d) Mammals and crossopterygians

Answer 1

Hint the first group of reptiles split 300 million years ago. These are vertebrates that have scales on at least some part of their body ,leathery or hard shelled eggs ,and share a number of other features. Snakes, lizards, turtles, crocodiles and birds are reptiles.

Complete answer: To answer this question you must know characteristics of reptiles.
In all vertebrates ,reptiles have bony skeletons that support their bodies. Reptiles live their entire life on land and reproduce in dry habits. Some reptiles are adapted to living in water such as turtles and penguins , but these species also come onto land to lay their eggs.
Amphibians need water in their habitat ,because they spend at least part of their life cycle in water and mammals evolved from a common ancestor they shared with the reptile's ancestor .
Crossopterygians are bony fish of the subclass crossopterygii ,having fleshy lump-like pectoral fins that contain the ancestor of the amphibians.
Birds are reptiles that have a similar skeleton to some kinds of dinosaurs ,which are reptiles. We even know from fossils that some dinosaurs have long arms ,long beaks(teeth) like birds.

Since birds and mammals are closely related to each other and show similar features of reptiles as mentioned above, therefore the correct answer is (C)birds and mammals.

Note: All reptiles have lungs ,so even those living in water must come to the surface to breathe air. Reptiles are found living in all habitats but most commonly found in warm, and tropical places. Reptiles are able to protect themselves from pollutants because toxins can’t penetrate their scales.