The mechanism that causes a gene to move
from one linkage group to another is called :
(1) Translocation
(2) Crossing-over
(3) Inversion
(4) Duplication

The primary producers of the deep-sea
hydrothermal vent ecosystem are :
(1) Blue-green algae
(2) Coral reefs
(3) Green algae
(4) Chemosynthetic bacteria

Which one of the following statements
is wrong ?
(1) Agar-agar is obtained from Gelidium and
Gracilaria
(2) Laminaria and Sargassum are used as food
(3) Algae increase the level of dissolved oxygen in
the immediate environment
(4) Algin is obtained from red algae, and
carrageenan from brown algae.

A cell organelle containing hydrolytic enzymes is :-
(1) Ribosome
(2) Mesosome
(3) Lysosome
(4) Microsome

Which of the following is hormone releasing IUD ?
(1) Lippes loop
(2) Cu7
(3) LNG-20
(4) Multiload 375