List some of the environmental factors that are potentially associated with male and female infertility?
What will be an ideal response?
Tobacco smoking, alcohol, and exposure to pesticides and other pollutants in air, water, soil or food.
Any environmental factors that affect the general health and weight of an individual can affect fertility.
Any environmental factors that lead to poor nutrition, be it overweight, underweight or malnutrition;
or, lead to emotional stress.
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Carriers
A. may have a persistent infection. B. may be a source of infection. C. usually show symptoms of the disease. D. have been cured of the infection. E. may have a persistent infection AND may be a source of infection.
What type of thinking is required?
What will be an ideal response?
Activated complement brings about the death of a microbe when it ________
a. mediates interactions between immune cells only b. activates a chemotaxic response in certain phagocytic cells only c. all of the choices d. organizes into a membrane pore and causes lysis of the cell only
What type of immunity results from recovery from an infection such as the chickenpox?
a. naturally acquired active immunity b. naturally acquired passive immunity c. artificially acquired active immunity d. artificially acquired passive immunity