H5N1 has a tropism for alveolar macrophage. what does this imply?
a. it mutates or becomes polymorphic in alveolar macrophages
b. ir altered or transformed alveolar macrophages
c. it replicates in alveolar macrophages
d. its capid topography (symmetry) is determined by alveolar macrophage
Answer: c. it replicates in alveolar macrophages
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A key difference between single-gene traits such as those Mendel studied and complex traits such as human height is that:
A. complex traits are generally uninfluenced by the environment, whereas single-gene traits have a significant environmental component. B. single-gene traits are generally uninfluenced by the environment, whereas complex traits have a significant environmental component. C. complex traits show incomplete dominance, whereas single-gene traits show simple dominance. D. single-gene traits show both simple and incomplete dominance, whereas complex traits show only simple dominance. E. None of these choices describe differences between single-gene and complex traits.
Synaptic vesicles discharge their contents by exocytosis at the
A. dendrite. B. axon hillock. C. nodes of Ranvier. D. postsynaptic membrane. E. presynaptic membrane.
In a living plant cell in a living plant, you would expect the cytoplasm to be ____
a. much more negatively charged than the fluid outside the cell b. essentially the same charge as the fluid outside the cell c. slightly more positively charged than the fluid outside the cell d. much more positively charged than the fluid outside the cell e. slightly more negatively charged than the fluid outside the cell
In all ecosystems, the biomass of primary producers is greater than the biomass of herbivores
Indicate whether the statement is true or false