Life cannot originate from inorganic materials now because of
Low atmospheric temperature
High degree of pollution
High atmospheric oxygen
Absence of raw materials
There are how many total races of man
Match the names of branches of biology listed under column $I$ with the field of study given under column $II$; choose the answer which gives the correct combiantion of the alphabets of the two columns
Column $I $ Column $ II$
(Branch of biology) (Field ofstudy)
$A$ Palynology $p$ Silkworms
$B$ Oncology $q$ Pollens
$C$ Phycology $r$ Cancer
$D$ Sericulture $s$ Algae
Which statement is correct for biomolecules
Mutation introduces new genes into a species and brings about the changes in