Question

Short/Long answer question
How would you identify a snake, an earthworm, a limbless lizard, and a limbless amphibian from one another?

Answer 1

Hint: The basis of external and internal characteristics such as the presence of scales, smooth skin, etc. are used to identify a snake, an earthworm, a limbless lizard, and a limbless amphibian from one another.

Complete answer:
-The earthworm, with a pointed posterior and anterior end, is a reddish-brown color. There are no eyes or other discerning facial traits, just a plain mouth opening. Earthworms have long segmented bodies covered in microscopic setae or bristles that help anchor and pull the worm via longitudinal contractions of the muscle.
-Animals that can live on land and in water are amphibians, which are distinguished by damp glandular skin, gills, and a lack of scales. Frogs, toads, salamanders, and newts are only examples of amphibians.
-The skin of a limbless amphibian is either flat or rough. It contains glands which (chromatophores) keep them moist and pigmented. Within their skin, limbless amphibians have calcite scales. There are also numerous ring-shaped folds on the skin, or annuli, which partially cover the body, giving them a segmented appearance. There are glands in the skin that secrete a toxin to prevent predators. Siphonops annulatus is an example of a limbless amphibian.
-Snakes are elongated, limbless, carnivorous reptiles. Snakes are ectothermic, amniotic vertebrates coated in overlapping scales, like all other squamates.
-Many snake species have skulls with far more joints than their lizard ancestors, allowing them to swallow prey with their extremely mobile jaws much wider than their heads.
-A snake is a reptile and reptiles have scale-covered skin, breathe air through their lungs, and lay hard-shelled eggs on the ground. Alligators, crocodiles, lizards, snakes, turtles, and tortoises are all examples of reptiles.

Note: -A lizard has an eyelid, so it's not a snake. There is an external ear opening in a lizard, while a snake does not have it.
-Earthworms have no lungs and absorb oxygen directly through their skin. In order to do this, they must stay moist and do so by lubricating their skin with glands along with their bodies.