After a fertility analysis, it is determined that the semen a man produces has the appropriate number of functional sperm cells, yet he is still having problems with his fertility. This indicates that something other than the sperm is causing the
problem. List one potential structure that could be causing the problem and what the problem would be.
What will be an ideal response?
The student could name any of the accessory glands in the male system. For example, malfunctions of the prostate, seminal vesicles, or the bulbourethral glands could cause problems.
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Bones move when _____ muscles contract
a. cardiac c. smooth b. skeletal d. all of these
Red algae ____
a. are primarily marine organisms b. are thought to have developed from green algae c. contain xanthophylls as their main accessory pigments d. are actually brown e. are primarily freshwater organisms
Why is anal sex more apt to transfer HIV than vaginal sex? What will be an ideal response?
Explain how the movement of hydrogen and potassium ions across the membranes of guard cells
opens and closes the stomata. What will be an ideal response?