Question

Sometimes characteristics are not heritable but are environmentally influenced. describe three characteristics that are not inherited but affect survival

Answer 1

1.       Growth (height and weight). It can be limited by the environment lacking essential nutrients in sufficient quantities.

2.       The density of red blood cells. It varies in direct proportion to the atmospheres partial pressure of oxygen. People living at high altitudes acclimate and produce more red blood cells.

3.       Corrective surgery or organ transplant. Improves the quality of life of humans but is not heritable.

Answer 2

Answer:

Approximately all characteristics are inheritable but some characteristic of our body is affected by the external environment.

Growth:

Growth is the basic property of a living organism. It can be controlled by the genes like height. But mainly it is dependent on the available nutrients to the body. So a healthy environment with all necessary nutrients leads to healthy perfect growth of the body.

RB C count:

Red blood cells counts also effected by environment. The environment which has a sufficient amount of oxygen leads to low blood count as compared to an environment with low oxygen which leads to high red blood cell count.

Immunity:

Immunity is the property of living organism to fight against the harmful agents that invade the body.

People most exposed to germs are more immune than people who often face the germs.