Question

write two characteristics each of
a. birds b. amphibians c. reptiles​

Answer 1

characteristics of birds-

1. birds are warm blooded vertebrates.

2.all birds have wings but not all bird can fly.

characteristics of amphibians-

1. they can live both in land and water.

2. their body is divided into head and trunk.

characteristics of reptiles-

1. they are four legged vertebral animal.

2. they breathe with the aids of their lungs.

Answer 2

Answer and Explanation:

Characteristics of Birds!

Feathers

Feathers are the defining characteristic of Aves, found on every living species of bird and no other class of animal. Feathers are made of keratin, the same substance that forms hair and nails in other animals and are highly modified scales. Feathers are critical not only for flight but also for warmth and protection against the elements -- and in many species, for males to attract mates. Soft, fluffy downy feathers help keep birds warm, contour feathers streamline birds’ bodies and aid in flying, and flight feathers on wings and tail give the bird loft. Birds shed, or molt, old feathers once or twice each year, depending on the species.

Beak

All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin. Birds do not have true teeth, but many species have tomia -- sharp ridges along the edges of their beaks. Birds do not chew food but grind or rip it into pieces small enough to swallow. The shape of a bird's beak indicates the bird's general diet. Meat-eaters like hawks and owls have sharp, hooked beaks for ripping and tearing. Strong, cone-shaped beaks help seed eaters break through shells. Ducks and geese have broad, flat beaks for straining food out of the water.

Characteristics of Reptiles and Amphibians

Reptiles

• Reptiles are vertebrates. They have backbones.
• Their bodies are completely covered with scales.
• They are cold-blooded.
• Reptiles produce shelled eggs or bear live young.
• All species fertilize eggs internally.
• All species of reptiles have at least one lung.

Amphibians

• Amphibians are vertebrates.
• Their skin is smooth and slimy.
• Amphibians breath through their skin, as well as their lungs in some cases.
• Amphibians are cold-blooded.
• They have a complex life cycle (larval and adult stages).
• Many species of amphibians vocalize. One example is the chorus frog.
• Some species fertilize eggs externally, some internally.