The first body segment of the earthworm is the _____

Where are the calciferous glands of the earthworm present?

In frogs, vasa efferentia arises from the _____

In which of these structures is collagen fibers present in rows between parallel bundles of fibers?

Which of these is not a division of hindgut in cockroach?

Which of the following statements is false about cockroaches?

Where are spermathecal pores located in cockroach?

In earthworms, ovarian funnels open into the __