Answer to Question 1
Answer: Research suggests that a man's exposure to chemicals influences the health of his future child. Some disorders can be traced to sperm damaged by chemicals. Sperm are naturally vulnerable to toxic chemicals and genetic damage.
Answer to Question 2
Answer: As opposed to other methods of contraception, sterilization is permanent. It can be an excellent method of contraception for committed, mutually monogamous couples, as it prevents unplanned pregnancies among couples that do not want any children or any more children, but does not prevent STIs.
Polyploidy has been an important factor in the evolution of plants.
This young child is pulling at the ear and acting fussy, two important signs of otitis media.
A poster encourages women to work in munitions to support the war effort.
A medical assistant performs a spirometry test using electronic health record software.
Life Expectancy for Birth in Men and Women
A fibrous root system has similar-sized adventitious roots that branch from the stem