Which is the smallest unit containing the entire human genome?
A) one human somatic cell
B) one human chromosome
C) all of the DNA in all of the cells of one human
D) all of the DNA in all of the cells of the entire human population
E) one human gamete
Answer: A
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Respond to statements 151–155 in reference to the five animal
phyla listed below. a. Annelida b. Arthropoda c. Mollusca d. Echinodermata e. Rotifera D 151. Trilobites were members of this phylum. M 152. The larval stage in this phylum has bilateral symmetry, whereas the adult stage exhibits radial symmetry. M 153. Although most members are enclosed by hardened shells, this phylum name literally means “soft body.” E 154. This phylum has the greatest number of species. D 155. “Wheel animals” are in this phylum.
You use several model organisms in your lab's research. Which of your model organisms would you expect to exhibit a higher mutation frequency: E. coli, D. melanogaster, or M. musculus?
What will be an ideal response?
Four of the five statements listed below apply to the types of ecological pyramids. Which one is FALSE?
a. A pyramid of numbers has the greatest number of organisms at the top. b. A pyramid of energy shows that energy increases as one goes toward the apex of the pyramid. c. A pyramid of biomass cannot be inverted. d. The base of all ecological pyramids is equal in size to the top. e. The pyramid of biomass show actual biomass reduction from one trophic level to the next.
The dental formula of catarrhine (Old World monkeys and apes) primates is: