Organisms that are phenotypically similar but genotypically different are said to be

Assign $A, B, C, D$ from the given type of reaction.
$HgI_2 \downarrow + 2KI \rightleftharpoons K_2[HgI_4]$

Endosperm is consumed by the developing embryo in the seed of

Electric potential at an equatorial point of a small dipole with dipole moment $P$ ($r$,distance from the dipole) is

The characteristics of a molecular probe are:
$I$. Very long molecule
$II$. Double-stranded
$III$. $DNA$ or $RNA$
$IV$. Complementary to a part of desired gene
The correct pair is:

The decreasing order of nucleophilicity among the following nucleophiles is:
$(I)$ $CH_3-COO^-$
$(II)$ $CH_3-O^-$
$(III)$ $CH_3-CH_2^-$
$(IV)$ $CH_3-SO_3^-$