The average amount of time that passes between the birth of a woman and the birth of her child is called:
A) reproductive time. B) birth rate. C) generation time. D) population rate.
Answer: C
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According to the multiregional hypothesis of human origins, modern H. sapiens evolved via _____ from _____ of H. ergaster
A. convergent evolution; multiple Old World populations B. adaptive radiation; a single Old World population C. parallel evolution; multiple Old World populations D. allopatric speciation; a single Old World population E. peripatric speciation; a single Old World population
Why is it a good strategy for a microbe to adhere to a receptor that plays a critical function for a host cell?
A. It ISN'T a good strategy-host cells could shift to a backup receptor and shut down production of the main receptor, preventing infection. B. If it's a receptor the cell MUST use, it doesn't have a backup system in place to switch to-so, even though it makes it susceptible to infection, it HAS to put that target out there. This benefits the microbe. C. Microbes need to evade detection and elimination by the immune system-if they adhere to a receptor that plays a critical function, they are less likely to trigger destructive immune responses. This would be similar to using a hostage as a shield in a police-standoff situation. D. It ISN'T a good strategy-by binding to receptors, microbes will be phagocytosed by cells and destroyed within them.
In Mendel’s experiments, which of the following generated identical F 1 and F 2 offspring ratios?
a. reciprocal crosses b. meiosis c. test crosses d. mitosis
Many human behavioral traits have both genetic and environmental components. Bipolar disorder has long been known to be familial, and more recently a number of genes and/or SNPs have been found to be involved
What are three or more reasons that this research has been hampered?