Biology Mcqs

Chitin in cockroach is absent in____________?

A. Epicuticle
B. Exocuticle
C. Endocuticle
D. All of these

In man which organisms cause abscesses on the skin of arms or legs?

A. Ascaris
B. Bacteria
C. Ring worm
D. Suinea worm

In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen?

A. Arthropods
B. Chordata
C. Annelida
D. Echinodermata

In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?

A. Endodermis
B. Mesophyll
C. Chitin
D. Epidermis

All insects have how many parts of legs?

A. 4
B. 2
C. 3
D. 6

In mouth cavity of many molluscs there is a rasg tongue like structure_________provided with many horny teeth.

A. Ligule
B. Radula
C. Mantle
D. Muscle

Snails belong to__________?

A. Cephalopodsxc
B. Gastropods
C. Bivalves
D. Athropods

It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates

A. Placenta
B. Notochord
C. Cranianta
D. Ligule

The phylum chrordata comprise about how many species?

A. 25,000
B. 50,000
C. 100,000
D. 10,00,000

Sub- phylum vertebrate is also known as__________?

A. Pisces
B. Craniata
C. Aves
D. Amphibia