The lack of which hormone would cause an adult man to exhibit a low sperm count and possibly be infertile?
A) LH
B) FSH
C) adrenaline
D) estrogen
B
You might also like to view...
Complex traits are usually quantified by ____________________ rather than by ____________________
Fill in the blank(s) with correct word
Why would co-administration of a bacteriostatic drug interfere with the effects of penicillin?
A. Since most bacteriostatic drugs are produced from bacteria, but penicillin is produced from mold, the two drugs are incompatible with each other. B. A bacteriostatic drug produces interference in the ability of a bacterial cell to take in compounds from the outside environment. Penicillin must be taken in by the cell in order to have its effect, so this would directly inhibit it. C. Penicillin interferes with cell wall production/stabilization by cross-linking of peptidoglycan. As such, it only works when the cells are actively replicating and MAKING new peptidoglycan. A bacteriostatic drug works by shutting down replication, holding the cells "static." This would interfere with the mode of action required by the penicillin. D. The bacteriostatic drugs would bind directly to the penicillin, preventing both its uptake by the cell and its ability to perform its duty within the bacterial cell.
Which early scientist proposed that cells arise only from preexisting cells by a process of division?
a. Anton van Leeuwenhoek b. Robert Brown c. Matthias Schleiden d. Theodor Schwann e. Rudolf Virchow
What is contained within the polar body?
A. corpus luteum B. egg cell C. primary follicle D. discarded chromosomes E. sperm cells