HIV or Human Immunodeficiency Virus kills or damages the body's Immune system cells. The correct answer is option B. HIV specifically damages or kills the T-Helper Lymphocytes or T-cells, which are very important to the body's immune system. These cells are the cells that respond rapidly to infections.
Answer:
endoplasmic reticulum (ER)
Explanation:
Its like the post office for the cell, It organizes and transports material throughout the cell.
There is no absolute reason as to how they survive besides organisms learning to adapt. In order to live in a polluted environment the animals have to survive and learn to adapt.
The function of the respiratory system in the respiratory process is to breathe.
The respiratory system functions for the conduction of air that is rich in oxygen into the lungs and the removal of air rich in carbon dioxide to the outside.
The respiratory system facilitates the exchange of gases through processes such as breathing, inhalation as well as exhalation occurring between the air and blood and also between the blood and body cells. The respiratory system also helps in sensing smell and creating sounds.
The respiratory system controlling breathing is also termed pulmonary ventilation. In the case of pulmonary ventilation, the air is inhaled through the nasal as well as oral cavities. It then moves through the pharynx, larynx, and trachea and finally into the lungs.
Then it is followed by the exhalation of air, which will be flowing back through the same pathway where inhalation occurs. Pulmonary ventilation is triggered by changes in volume and air pressure in the lungs.
During normal inhalation, contraction of the diaphragm and external intercostal muscles takes place and then the ribcage elevates.
Learn more about the respiratory system at
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*Genetic determinism of sexes
*Two types are known.
I. Drosophila met at mammals , insects and some plants.
a) Chromosomes have notation:
Masculine ⇒ xy
Feminine⇒xx
II. Abraxas met at amphibians,reptiles,birds and fish.
a) Chromosomes have notation:
Masculine⇒xx
Feminine⇒xy