Biology Mcqs

Of the following which one is not included in Proterostomes?

A. Arthropods
B. Hemichordates
C. Annelids
D. Molluses

Inner layers of the sponges are made up of__________?

A. acocytes
B. Choanoderm
C. Choanoytes
D. acoderm

Sperms are _________ in origin.

A. Ectodermal
B. Mesodermal
C. Endodermal
D. None of these

Gut in pseudocoelomates is made from___________?

A. Ectoderm
B. Mesoderm
C. Endoderm
D. All of these

The skeleton of the sponges is in the form of variously shaped needle like structures called___________?

A. Stripules
B. Spicules
C. Brails
D. Ses

The internal buds are known as__________?

A. Spicules
B. Choanocytes
C. Gemmules
D. None of these

Venus flower basket is also known as___________?

A. Sycon
B. Euplectella
C. Leucoselenia
D. Spongilla

In acoelomates gut is ________ in origin.

A. Ectodermal
B. Endodermal
C. Mesodermal
D. None of these

The system well developed in the acoelomate is___________?

A. Excretory system
B. Nervous system
C. Transport system
D. All of these

The fate of each blastomere is foretold. The cleavage will be as____________?

A. Spiral and indeterminate
B. Radial and indeterminate
C. Radial and indeterminate
D. Spiral and determinate