In your fertility clinic, you look at the lab results of a young man. He has a prostate gland the size of a golf ball, a fructose-rich semen, and 10 million sperm per ml. His sperm consist of little more than DNA, mitochondria, and a flagellum, with almost no cytoplasm. Also, he has follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in his bloodstream. Which of these is the likely cause of his fertility problems?
A. FSH and LH
B. Enlarged prostate gland
C. Fructose in the semen
D. Sperm morphology
E. Sperm count
Answer: E
You might also like to view...
You have two beakers. One contains pure water, the other contains pure methanol (wood alcohol). The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules
You pour crystals of table salt (NaCl) into each beaker. Predict what will happen. A) Equal amounts of NaCl crystals will dissolve in both water and methanol. B) NaCl crystals will not dissolve in either water or methanol. C) NaCl crystals will dissolve readily in water but will not dissolve in methanol. D) NaCl crystals will dissolve readily in methanol but will not dissolve in water. E) When the first crystals of NaCl are added to water or to methanol, they will not dissolve; but as more crystals are added, the crystals will begin to dissolve faster and faster.
A(n) __________ produces pollen grains
a. anther b. carpel c. filament d. style
A new antibiotic is developed that interferes with the way tRNA fits into bacterial ribosomes. How would this kill the bacteria?
A) The bacteria would be unable to produce necessary enzymes to carry out basic metabolism. B) The tRNA would be unable to carry out transcription. C) Ribosomes would not be able to produce mRNA, and cell functions would halt. D) tRNA would not unwind the DNA to allow DNA polymerase to copy it; thus, cell division would stop.
If a certain water-soluble, intravenous antibiotic is not succeeding in defeating the germs inside the central nervous system, the ________ may be preventing the antibiotic from reaching the brain
Fill in the blank(s) with correct word