You discover a fungus that is associated with plant roots, with hyphae that actually penetrate the root cells and
produces tree-like structures within the root cells. Into which group should you classify this fungus?
a. Glomeromycota
b. Basidiomycota
c. Chytridiomycota
d. Zygomycota
e. Ascomycota
ANSWER: a
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During a lecture on adaptive evolution, your instructor is explaining how dark-colored moths were selected for during the Industrial Revolution in England, due to their better camouflage against soot-covered trees and buildings. One of the other students in the class interrupts the lecture to insist that this example does not support the theory of evolution because the genes for both light colored and dark colored moths already existed prior to the Industrial Revolution. What mistake has your classmate made?
a. The genes for dark colored moths were in fact created by natural selection during the Industrial Revolution. b. This example is entirely hypothetical; moths do not fossilize so there is no way to document their phenotypes in the past. c. Natural selection is intended to explain the change in frequency of existing alleles in a population over time. d. Your classmate raises an original point that certainly would not be a waste of the class’s time to argue about yet again.
Which of the following pathogens/diseases would be the easiest to eradicate?
A. A pathogen that mostly infects animals but also sometimes causes disease in humans. B. A pathogen that only infects humans and rarely causes signs and symptoms. C. A disease that is asymptomatic and is carried by a large number of people in a population. D. A pathogen that only infects humans and causes obvious signs and symptoms. E. A pathogen that causes disease in both animals and humans.
Whereas the zygotes of charophytes may remain within maternal tissues during their initial development, one should not expect to observe
A) any nutrients from maternal tissues being used by the zygotes. B) specialized placental transfer cells surrounding the zygotes. C) the zygotes undergoing nuclear division. D) mitochondria in the maternal tissues, or in the tissues of the zygotes. E) the zygotes digested by enzymes from maternal lysosomes.
Diana has been fasting for a few days and decides to go for a short run before breaking her fast. The glucose she needs for her run will come from________.
A. cellular respiration B. insulin C. glycolysis D. breaking glycogen down to small molecules E. breaking starch down to small molecules