Questions

A nitrogenous base, or nitrogen-containing base, is an organic molecule with a nitrogen atom that has the chemical properties of a base. The main biological function of a nitrogenous base is to bond nucleic acids together. A nitrogenous base owes its basic properties to the lone pair of electrons of a nitrogen atom.

In DNA, four bases have been found. They are

1. Adenine (A),

2. Guanine (G),

3. Cytosine (C) and

4. Thymine (T).

The first three of these bases are found in RNA also but the fourth which is Uracil (U) is absent in it.

RNA contains cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine.

Sea appears blue in colour due to the scattering of the rays when they hit water molecules

The SCPCA method can be used to evaluate channel members.

a) Sales (S): How much sales each channel member can give within a cetain time frame

b) Cost(C): How much cost would be incurred for each channel?

c) Profitability(P): Which channel can give better profitability to the company?

d) Control(C): Whether company can have better control over its channel members or not.

e) Adaptability (A): Whether the channel alternatives are flexible enough to any changes or not. The channel meeting the objectives of the company is selected

Genetic drift or allelic drift is the change in the relative frequency in which a gene variant (allele) occurs in a population due to random sampling and chance.

When is genetic drift a major factor in evolution is

* When there is low gene flow.

* When there is no selective pressure.

* When there is a bottleneck.