Each one of the following options has a rule regarding a certain animal group and an exception from that group written in brackets. Which one is incorrect?

Question

Each one of the following options has a rule regarding a certain animal group and an exception from that group written in brackets. Which one is incorrect? (A) Reptiles have an incompletely four-chambered heart. (Crocodilus) (B) Amphibians have two pairs of limbs. (Ichthyophis) (C) Sponges are found in marine water. (Spongilla) (D) Roundworms are monoecious. (Ascaris)

Tardigrade Admin · Accepted Answer

Reptiles have an incompletely four-chambered heart. Crocodilus (crocodile) has a completely four-chambered heart. Amphibians have two pairs of limbs. Ichthyophis is a limbless amphibian. Sponges are found in marine water. Spongilla is a freshwater sponge. Roundworms (Ascehelminthes) are dioecious in which males and females are separate. Ascaris is also a dioecious roundworm following the rule.

Q. Each one of the following options has a rule regarding a certain animal group and an exception from that group written in brackets. Which one is incorrect?

Reptiles have an incompletely four-chambered heart. (Crocodilus)

Amphibians have two pairs of limbs. (Ichthyophis)

Sponges are found in marine water. (Spongilla)

Roundworms are monoecious. (Ascaris)