AP BIOLOGY

Detailed explanation-1: -Reptiles and birds primarily lay amniotic eggs. Mammals also lay amniotic eggs though they are specialized for internal development. However, prehistoric mammals laid eggs and some modern-day mammals still do.

Detailed explanation-2: -Most reptiles, including snakes, turtles, lizards, and crocodiles lay eggs. Reptiles are cold-blooded vertebrate animals. Crocodiles are the largest reptiles in the world. They can grow up to 18ft long.

Detailed explanation-3: -Birds-are warm-blooded, covered in feathers and lay eggs. o All birds have feathers, wings, and a beak, and stand on two legs. o Bird locomotion varies greatly; while most fly, there are many who cannot and will run or swim to travel. o Diets are different for all birds; the shape of their beak tells us what they eat.

Detailed explanation-4: -So, the correct answer is ‘Mammals’.

Detailed explanation-5: -Fish are aquatic vertebrate animals that have gills but lack limbs with digits, like fingers or toes. Recall that vertebrates are animals with internal backbones. Most fish are streamlined in their general body form.