What metabolism would be favored when there is a lack of electron acceptors?
A) anaerobic fermentation
B) anoxygenic photosynthesis
C) anoxic ammonia oxidation
D) acetogenesis
Answer: A
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An arrangement of microtubules located in the matrix of cilia and flagella is called the ________.
A. axial bundle B. axoneme C. axillary tubule D. axial filament
Solution A has a pH of 6 and solution B has a pH of 8. Therefore, ____
a. A has 10 times greater H+ concentration than B. b. B has 10 times greater H+ concentration than A. c. A has 100 times greater H+ concentration than B. d. B has 100 times greater H+ concentration than A. e. A has 1,000 times greater H+ concentration than B.
In California, a species of salamanders were geographically separated over time. The group that lived in southern California relied heavily on large gold blotches on their skin that helped to camouflage them from predators. The group that lived along the coast adopted a color pattern that mimicked a poisonous, colorful newt common to that area. Instead of being camouflaged, these salamanders advertised their colors. What type of selection process has occurred over time?
A. artificial selection B. natural selection C. theoretical selection D. experimental selection
Lepidopterans (moths and butterflies) sometimes have specialized flying behaviors. Some moths have the ability to do sudden vertical drops when they detect bat sonar, to avoid being eaten. Other species use special flying techniques to attract a mate.When biologists talk about the "cause" of a behavior, they may be referring to two different things. The proximate cause is the sequence of physiological events that lead to the behavior in an individual. The ultimate cause is the adaptive benefit to the animal that allowed natural selection to sculpt the behavior over evolutionary time. Understanding both the proximate and ultimate basis of behavior is important, and different types of biologists may focus on each.What could you study to better understand the ultimate basis of this
behavior? (Check all that apply) A. flying behavior in related species B. wing muscle development C. sensory organs D. physiology E. brain structure F. mating behavior G. predation H. hormones