Answer:
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Explanation:
Essentially, guard cells are two bean-shaped cells that surround a stoma. As epidermal cells, they play an important role in gaseous exchange in and out of plant leaves by regulating the opening and closing of pores known as a stoma.
Food and Agriculture
Of all sectors of the economy, agriculture is the one that could be severely affected by El Nino. Drought can be said as the main threat to food production, but heavy rains, flooding, and extremely hot or cold weather caused by El Nino are also pretty much as dangerous
Answer:
Genetic disorders are conditions or diseases that are inherited by a person from the parent which is caused by mutation of the DNA.
HIV is different from genetic disorder because it is not inherited rather it is acquired through sex or contact with an infected person's blood through cut,pictures or transfusion.
Explanation:
HIV is a disease that weakens the body defence mechanism in fighting infections thereby making it prone to Infection.it can be acquired through sex or contact with infected person's blood.
Genetic disorders are inherited conditions which is caused by DNA mutation.
Answer:
Population density is the number of individuals per unit geographic area, for example, number per square meter, per hectare, or per square kilometer.
Explanation: