Classification of Animals Test - 1

Leech and earthworm are examples of animals belonging to Phylum Annelida. They are triploblastic and bilaterally symmetrical. They have a true coelom and have extensive body differentiation.

Segmented worms do not have wings. Hence, the feature that is not shown by a segmented worm is the presence of a pair of wings.

The correct answer is C.

Why alternatives A, B and D are wrong:

Segmented worms have soft bodies and organs present in different segments. Also, they are characterized by an absence of legs. The features mentioned in alternatives A, B, and D are shown by segmented worms. Hence, these alternatives are incorrect.

Corals are fixed to the substratum and do not have a muscular foot. They do not have a protective shell and their bodies are covered by a hard skeleton. They are not mollusks. They are cnidarians. Other members of cnidarians include anemones and jelly fish.

The correct answer is C.

Why alternatives A, B and D are wrong:

Snails, clams, and octopuses are mollusks. Hence, alternatives A, B, and D are incorrect.

Both mammals and amphibians lack body scales. Hence, the feature common to both rats and frogs is that they both lack body scales.

The correct answer is C.

Why alternative A is wrong:

Only mammals have furs on their bodies. Hence, this alternative is incorrect.

Why alternative B is wrong:

Only rats have tails. Hence, this alternative is incorrect.

Why alternative D is wrong:

Rats have clawed feet, while frogs lack clawed feet. Hence, this alternative is incorrect.

A sting ray is a cartilaginous fish with a cartilaginous endoskeleton.

The correct answer is A.

Why alternatives B, C and D are wrong:

Sea horse, angler fish, and climbing perch have bony endoskeletons.

An opossum is a mammal while an ostrich is a bird. They show different characteristics and are not related.

The correct answer is D.

Why alternative A is wrong:

An owl and a parakeet are both birds showing avian characteristics.

Why alternative B is wrong:

A kangaroo and a koala are both marsupial mammals.

Why alternative C is wrong:

A crocodile and a turtle are both reptiles and exhibit reptilian characteristics.

Hydra and jelly fish are coelenterates. They have tentacles on their bodies. Tentacles are feeding and protective structures commonly found on the bodies of the members of phylum coelenterata.

The correct answer is A.

Why alternatives B, C and D are wrong:

Coelenterates are not flat and ribbon-like; they do not have pores on their bodies, and their bodies are not covered with a protective shell.