Answer: Option B. -> False
:
B

Varations that occur in the somatic cells are known as somatic variations. They are variation that are not passed on from one generation to another generation. Germinal variations are the variations that take place in the germ cells. These variations are inherited by the future generations.

Answer: Option C. -> molecular phylogeny
:
C
Molecular phylogeny is the technique that employs comparison of changes accumulated in the DNA of an organism over generations to establish evolutionary relationships. This approach is based on the idea that organisms which are more distantly related will accumulate a greater number of differences in their DNA.

Answer: Option B. -> False
:
B
The two populations of the beetles are separated by a river, due to which the migration between the two communities is limited, but not restricted. Due to this, there is only a minimum possibility gene flow between the two populations.

Answer: Option C. -> Africa
:
C

According to fossils discovered up to present time, the origin and evolution of man started from Africa. Regardless of where we have lived for the past few thousand years, we all come from Africa. The earliest members of the human species, Homo sapiens, can be traced there. Even our genetic footprints can be traced back to our African roots.  According to various models and theories, modern humans originated in Africa and started to disperse through the world roughly 50,000 to 100,000 years ago. Such theories are based on the human fossil timeline records.

Answer: Option A. -> Serve similar function
:
A and D
Analogous organs are those which serve similar function but do not share similar structure and origin. A common example of analogous organs is wings of butterfly and a bird. Both are used for flying, but  neither their structures are similar nor they originate from a common ancestor. 

Answer: Option B. -> False
:
B
A male gamete with an X chromosome, when it fuses with a female egg which always has an X chromosome, the offspring will have an XX chromosome pair. This means the eventual offspring will be a female child. Sex determination in humans is based on XX-XY system where XX means female XY means male.

Answer: Option C. -> 22
:
C
Humans have a total of 23 pairs of chromosomes, out of which 22 pairs are autosomes and 1 pair has sex chromosomes.
$\bullet$ The members of the autosomal pairs are homologous i.e., they are similar in shape and organisation.
$\bullet$ On the other hand, sex chomosomes or allosomes may be heterologous (in males) or homologous (in females). 

Answer: Option C. -> chimpanzee
:
C
Humans did not evolve from monkeys. Humans are more closely related to modern apes than to monkeys, but we didn't evolve from apes either. There existed a common ancestor for both the chimpanzees and humans, about 5-8 million years ago. Later, the two lineages diverged into two separate lineages. One of these lineages ultimately evolved into chimps and other apes, and the other evolved into early human ancestors called hominids.