Horseshoe crabs
A)are,like their relatives the trilobites and eurypterids,now extinct.
B)are poisonous to humans.
C)live in freshwater habitats.
D)have a long,spine-like telson.
E)are adult forms of trilobites.

Question

Quizplus · Accepted Answer

Horseshoe crabs have a long, spine-like telson, which is used for steering and flipping the crab over if it is upside down. None of the other options are true - horseshoe crabs are not extinct, poisonous to humans, freshwater animals, or adults forms of trilobites (they are a separate group of animals).

Horseshoe Crabs