Niche is
(1) all the biological factors in the organism
environment
(2) the physical space where an organism live
(3) the range of temperature that the organism
needs to live
(4) the functional role played by the organism
where it lives

All of the following are part of an operon
except :-
(1) an operator
(2) structural genes
(3) an enhancer
(4) a promoter

The experimental proof for semiconservative
replication of DNA was first shown in a [new]
(1) Fungus
(2) Bacterium
(3) Plant
(4) Virus

Select the correct statement :
(1) Franklin Stahl coined the term "linkage".
(2) Punnett square was developed by a British
scientist.
(3) Spliceosomes take part in translation.
(4) Transduction was discovered by S. Altman.

Which of the following has proved helpful in
preserving pollen as fossils ?
(1) Pollenkitt
(2) Cellulosic intine
(3) Oil content
(4) Sporopollenin

Which of the following is an occupational
respiratory disorder ? :
(1) Anthracis
(2) Silicosis
(3) Botulism
(4) Emphysema