Explanation:
In population genetics, the term evolution is defined as a change in the frequency of an allele in a population. ... The allele frequency within a given population can change depending on environmental factors; therefore, certain alleles become more widespread than others during the process of natural selection.
Explanation:
There are two compositions in blood.
1. Plasma (55%)
2. Blood cells (45%)
Again Blood cells is divided into:
RBC ( Red blood cell)
It transports oxygen for respiration.
WBC ( White blood cell):
They help in the formation of antibodies to fight against germs and bacteria.
Platelets:
It plays major role in healing of the wounds.
Answer:
The excretory and reproductive systems are closely interlinked. Both share certain common passages such as in males where urinary tract gives passage to both urine and semen. Although in females these are seperate, the urinary bladder is present posterior to the uterus and very close.
