Biology - Study Mode

[#686] The number pyrenoids in Chlamydomonas is
Correct Answer

(A) 1

Explanation

Solution: The number pyrenoids in Chlamydomonas is 1.

[#687] Commercial agar is obtained from
Correct Answer

(B) Gracilaria

Explanation

Solution: The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from tengusa (Gelidiaceae) and ogonori (Gracilaria). For commercial purposes, it is derived primarily from ogonori.

[#688] Red snow causing alga is
Correct Answer

(A) Chamydomonas nivalis

Explanation

Solution: It is the algae that give the snow its red tinge. This alga species, Chlamydomonas nivalis, exists in snow in the polar and glacial regions, and carries a red pigment to keep itself warm .

[#689] Cork-screw shaped bacteria are known as
Correct Answer

(C) Spirilla

Explanation

Solution: The bacteria which are twisted, helical or spiral in shape and called spirilla.

[#690] Ringworm is a disease caused by
Correct Answer

(A) Fungi

Explanation

Solution: Ringworm is a common infection of the skin and nails that is caused by fungus. The infection is called “ringworm” because it can cause an itchy, red, circular rash.