STD 12 - 12. ecosystem — NEET STD 11 Science — Question

Here $A$ and $B$ refer to

$A$. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.

$B$. Tropical environments are more seasonal.

$C$. More solar energy is available in tropics.

$D$. Constant environments promote niche specialization.

$E$. Tropical environments are constant and predictable.

Choose the correct answer from the options given below.

$I.$ Recombinant $DNA$ technology popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic material by man in vitro

$II. pBR322$ is the first artificial cloning vector developed in $1977$ by Boliver and Rodriquez from $E$. coli plasmid

$III.$ Restriction enzymes belong to a class of enzymes called nucleases

Which of the statements given above are correct?