Imagine five forest communities, each with one hundred individuals distributed among four different tree species (W, X, Y, and Z). Which forest community would be most diverse?
A) 25W, 25X, 25Y, 25Z
B) 40W, 30X, 20Y, 10Z
C) 50W, 25X, 15Y, 10Z
D) 70W, 10X, 10Y, 10Z
E) 100W, 0X, 0Y, 0Z
Answer: A
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Alicia is studying for a quiz on the parts of the neuron. She is having trouble remembering that the part(s) of the neuron that receive(s) the incoming message is/are called _____, which are considered part of the postsynaptic side of the neuron.
a. axons b. soma c. dendrites d. ribosomes
Photoheterotrophs are best described as organisms that obtain energy to make ATP
A) from organic compounds but use sunlight to produce carbon sources. B) and organic compounds from sunlight. C) from sunlight but cannot make organic compounds from CO2. D) from some forms of chemicals. E) from organic compounds.
Which solution has the potential to diffuse the fastest?
a. A solution with large molecules as opposed to smaller ones. b. A solution with a higher concentration of molecules as opposed to one with a lower concentration. c. A solution that is under low pressure as opposed to one under high pressure. d. A solution that is at a low temperature as opposed to one at a higher temperature. e. A solution containing a hydrophilic solute as opposed to a salt.
In the accompanying figure of Jones and Reithel's work with snapdragons, what is the most likely outcome if these plants were in a natural setting?
A) A 2% change is too small to be significant, so yellow and white flowers will remain in roughly equal percentages in future generations. B) Yellow and white flowers will oscillate in frequencies, depending on environmental conditions such as rainfall. C) Yellow flowers will continue to increase in frequency, as compared to white flowers, over time. D) Because the yellow trait is recessive, yellow flowers will ultimately take over the population.