After a robbery, two witnesses may describe the incident very differently from one another. Explain why
What will be an ideal response?
ANSWER: Perception is based on a number of different factors, including the types of receptors that
are involved in the perception of a situation, the enhancement or diminishment of stimuli
during processing, and processing in the cortex. Humans mostly have the same types of
receptors, so the biggest difference between the perception of two people comes down to
the comparison of the situation to memories of a previous,similar situation.
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Regulatory transcription factors _____
A) influence the binding of sigma factor to DNA B) influence the assembly of the basal transcription complex C) influence the degree of unwinding of DNA at the promoter D) open the two strands of DNA so that RNA polymerase can begin transcription
Which of the following is true of both first- and second-division nondisjunction? (Choose all that apply)
A. Gametes are produced with extra chromosomes B. Gametes are produced with missing chromosomes C. Sister chromatids fail to separate D. Homologous chromosomes fail to separate E. Half of the gametes produced are wildtype, while half are mutated
Some organisms are not able to live in an environment where there is oxygen; these types of organisms
are called obligate anaerobes. Which of the following proposals is the most likely for how they survive without oxygen?
a. They are able to survive using less energy than aerobes. b. All of their ATP is imported into the cell from an external source. c. Sulfur is used instead of oxygen because it is chemically similar. d. These organisms use photosynthesis to produce energy. e. Their mitochondria are damaged, and consequently they are short-lived.
Sea creatures which are adapted to life at the bottom of the ocean reside ____
a. in the pelagic zone b. in the intertidal zone c. in the neritic zone d. near hydrothermal vents e. in the benthic province