$A$ - Smoking increases $O_2$, content in blood. $R$ - Nicotine stimulates adrenal gland.
$A$ and $R$ both are correct.
$A$ and $R$ both are incorrect.
$A$ is correct, $R$ is incorrect.
$A$ is incorrect, $R$ is correct.
Oncogenes were discovered by
Assertion : Dope test is used to estimate the level of blood alcohol by analyzing the breath of persons drinking alcohol.
Reason : A drunken person usually feels tense and less talkative.
Match the columns :
Column - $I$ | Column - $II$ |
$(a)$ Pre erythrocytiC cycle | $(1)$ Meta cryptomerozoites enters RBC and becomes spherical in shape. |
$(b)$ Exo-erythrocyticcycle | $(2)$ sporozoites in saliva are introduced to human blood |
$(c)$ Endo-erythrocytic cycle | $(3)$ Breaks the liver cells and comes our of blood. |
Identify the molecules $(A)$ and $(B)$ shown below and select the right option giving their source and use.
Molecule $\to $ Source $\to $ Uses