In living beings ammonia is converted into urea through

• ornithine cycle

• citrulline cycle

• fumarine cycle

• arginine cycle

Total number of bones in the hind limb of a man is

• 21

• 23

• 27

• 30

A definite number of segments are found in

• slug

• earthworm

• leech

• tapeworm

Biologically most resistant plant material is

• sporopollenin

• cutin

• lignin

• suberin

Which of the following is an edible fungus?

• Agaricus

• Albugo

• Rhizopus

• Puccinia

Blue- green algae is found in

• Cycas

• Pinus

• Scales of Marchantia

• Riccia

Turpentine oil is obtained from

• Pinus

• Cycas

• Cedrus

• Delbergia

In gametophyte of fern

• prothallus is independent from sporophyte

• prothallus is attached with sporophyte

• it is main plant body

• a structure attached with rhizome

The lack of fruit formation in gymnosperm is due to

• absence of fertilization

• lack of seeds

• naked ovule

• sheding of immature seed

A secretion that digests both carbohydrates and proteins is

• ptyalin

• pepsin

• pancreatic juice

• saliva