Animals are divided into two main groups: vertebrates (with internal backbones) and invertebrates (without internal backbones). The main divisions of vertebrates are fish, amphibians, reptiles, birds, and mammals. Fish have fins and scales. ... Amphibians have smooth, moist skin and breathe through lungs as adults.
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Answer:
Animals are divided into two main groups: vertebrates (with internal backbones) and invertebrates (without internal backbones). The main divisions of vertebrates are fish, amphibians, reptiles, birds, and mammals. Fish have fins and scales. ... Amphibians have smooth, moist skin and breathe through lungs as adults.
Explanation:
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Answer:
1. Shark has a muscular, asymmetrical, upturned tail; pointed fins
2. frog has a protruding eyes, no tail, and strong, webbed hind feet, Four Limbs
3. Lizard has scales, paired male copulatory organs, and a flexible skull
4. Rooster has Neck feathers, called hackle feathers, are rounder and shorter on a hen