Biology Mcqs

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

• (A)  Ligule
• (B)  Radula
• (C)  Mantle
• (D)  Muscle

Answer

Submitted By :Ali Uppal

Snails belong to__________?

• (A)  Cephalopodsxc
• (B)  Gastropods
• (C)  Bivalves
• (D)  Athropods

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

The phylum chrordata comprise about how many species?

• (A)  25,000
• (B)  50,000
• (C)  100,000
• (D)  10,00,000

Answer

Submitted By :Ali Uppal

Sub- phylum vertebrate is also known as__________?

• (A)  Pisces
• (B)  Craniata
• (C)  Aves
• (D)  Amphibia

Answer

Submitted By :Ali Uppal

They are considered to be the most primitive and are surely the first of the vertebrates?

• (A)  Frogs
• (B)  Reptiles
• (C)  Amphibinas
• (D)  Jawless fishes

Answer

Submitted By :Ali Uppal

Scolidon or dog fish belong to the group of fishes called__________?

• (A)  Cartilaginous fishes
• (B)  Bony fishes
• (C)  Running fishes
• (D)  Jawless fishes

Answer

Submitted By :Ali Uppal

Nephrostome in earthworm opens in____________?

• (A)  External space
• (B)  Internal Body cavity
• (C)  In gut
• (D)  In Bladder

Answer

Submitted By :Ali Uppal

The nephridia of earthworm open into the coelom by_________?

• (A)  Nephrostome
• (B)  Nephridiopore
• (C)  Flame cell
• (D)  Anus

Answer

Submitted By :Ali Uppal

Which one of the following is representing the group of diatoms?

• (A)  Pinnularia, Navicula, Cymbella, Melosira
• (B)  Euglenamorpha, Hedneria , Heteronema, Colacium
• (C)  Nostoc, Anabaena, Aulosira, Cylindrospermum
• (D)  Cochlodinium, Gymnodinium, Lenodinium, Peridinium

Answer

Submitted By :Ali Uppal