Following a revision, Sinanthropus pekinensis became known as:
A. Anatomically modern humans
B. Neandertals
C. Homo erectus
D. Homo habilis(sensu lato)
E. Paranthropus boisei
Ans: C. Homo erectus
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Plant hormones bind specific cellular receptor molecules that trigger gene expression responses. Which statement is correct concerning these responses?
A. Only cells lacking receptors can bind hormones. B. Only cells in the meristem can respond. C. Only cells that express the appropriate receptors can bind hormones. D. Only cells that have been previously activated can bind hormones. E. None of these choices is correct.
How many electrons are in the innermost
electron shell of a phosphorus atom?
a. 1 b. 2 c. 3 d. 5 e. 8
Humans have ____
a. more taste receptors than olfactory receptors b. more olfactory receptors than taste receptors c. a high degree of dependency on pheromones d. approximately six types of olfactory receptors e. an advanced vomeronasal organ
When comparing the gene coding for cytochrome c in several species, it was noted that humans and
chimpanzees share the identical amino acid sequence with a change in only one location. This means that a. humans and chimpanzees can mate and produce viable offspring. b. humans evolved from chimpanzees. c. over time, chimpanzees will eventually evolve into primitive humans. d. humans and chimpanzees are closely related in evolutionary time. e. there is nothing particularly informative about this discovery.