On the slopes of the Washington Cascades, ecologists have studied some closely related vole species for decades. Many of these vole species, when they occur on separate mountains, tend to choose very similar seed sizes for food
However, when these species occur together on the same mountain slope, their food choices tend to differ, with some species selecting small seeds and others feeding exclusively on larger seeds. This behavior may be an example of
A) intraspecific competition.
B) resource partitioning.
C) intraspecific range diversion.
D) habitat fragmentation.
E) niche fragmentation.
B
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Which of the following is NOT a goal of recombinant DNA technology?
A. combining genetic material from more than one organism to produce new useful organisms B. making it possible to clone humans C. eliminating undesirable traits from livestock or crops D. being able to remove or correct damaging traits in humans E. creating organisms capable of producing useful products
Instead of a(n) ____________________ group to link nucleotides together, the modified nucleotides used during automated DNA sequencing have only an -H. Fill in the blank(s) with the appropriate word(s)
Answer the following questions true (T) or false (F)
1. The epidemiological triangle is equally useful for describing noninfectious diseases as it is infectious diseases. 2. It is legal for the CDC to quarantine any person entering or already in the United States who may have an infectious disease that is deemed quarantinable. 3. It can be challenging to accurately determine incidence rate for diseases with high percentages of asymptomatic cases or when a pathogen mutates to become more infective and/or virulent.
Which cell type is responsible for the strength of the secondary immune response?
A. naïve B cells B. plasma cells C. memory cells D. All of the answer options are correct.