The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs.
a. true
b. false
Ans: a. true
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The first group of plants with flowers were:
a. algae b. fern allies c. ferns d. angiosperms e. gymnosperms
A flagellum is to a bacterium as ____ is to a
boat.
a. a captain b. an engine c. a propeller d. a bow e. an anchor
What does the model of island biogeography predict about: A. the relationship between the distance of an island from the mainland and immigration of species? Draw a graph depicting the relationship.B. the relationship between the size of an island and the rate of extinction? Draw a graph depicting the relationship.C. what type of island will have a higher equilibrium species richness than the other types of islands? Combine (and draw) the two previous graphs and indicate the equilibrium species richness of each island.
What will be an ideal response?
Autoimmune disorders are
A) chronic conditions that develop from the immune system attacking healthy self-tissues that should normally be left alone. B) genetic conditions present from birth that continually degrade over time. C) caused by the immune system not being stimulated enough in adolescence and as a result is over reactive and can cross-react with host tissues. D) acute infections that target the immune system. E) short-term mistakes made by the immune system that are quickly recognized and self-limited.