The distribution of aquatic life is affected by the aquatic factors due to the ecological balance which exist in a spot inside the aquatic ecosystem.
Explanation:
An ecosystem is the interaction between the living thing which is biotic factors and non living things which are abiotic factors, inside an environment. These factors together constitute the aquatic factors.
The abiotic factors are like sunlight, temperature, chemical composition, water disturbances and terrain. The biotic factors depends upon these for their distribution or presence of life. Like the one who survives within bright sunlight must dwell in upper stream of waters and the one survivng in dark waters, then comes with other factors as living in terrain with no disturbance or with some water disturbances.
It is estimated that the Precambrian Era lasted between 3.9 and 4 billion years. Many scientists believe that this era accounts for 90 percent of the world's history.
B) Telomerase is a ribonuclear protein containing a section of RNA complementary to the telomeres
C. telomerase is reactivated in cancer cells, contributing to their immortality
Explanation:
Telomerase elongates telomere ends
Telomerase binds to a RNA molecule containing a sequence complementary to the telomeric repeat.
Telomerase is usually not active in somatic cells but is active in cancer cells- the protein acts to extend the shortened telomeres in these cells preventing them from dying
