©McGraw-Hill EducationAssume that the ancestor of this phylogeny had vascular tissue and chlorophyll. If this is true, which answer lists all key traits of a ginkgo?
A. needles, tree, and seeds
B. tree and seeds
C. seeds, tree, vascular tissue, and chlorophyll
D. vascular tissue, needles, tree, and chlorophyll
Answer: C
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Metagenomics offers a DNA-based method to understand
A. the history of species diversity. B. microbial stability C. microbial diversity. D. the organismic model of communities. E. the Shannon Diversity Index.
Neurotransmitters are released by _____
a. axon terminals c. dendrites b. the cell body d. the myelin sheath
__________ relay signals between neurons. Fill in the blank(s) with the appropriate word(s)
Which of the following characteristics are true for an action potential?I A threshold potential must be exceeded for an action potential to occur.II A stimulus either produces a full action potential or none at all.III During the refractory period it is less likely that stimuli can produce another action potential.
A. II and III B. I and III C. I and II D. I, II, and III E. I only