Which of the following is an example of how “maximum likelihood” is used by systematists
a. using the simplest explanation necessary to interpret the data
b. assigning humans and chimpanzees to a less inclusive taxon
c. using probability to determine that the nucleotide sequences in DNA and RNA change at a
constant rate over time
d. establishing the membership in a clade using the phenetic approach
e. distinguishing shared ancestral characteristics and shared derived characters
C
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Abiotic components of an ecosystem include
A. only animal life. B. both living and nonliving components. C. living components only. D. nonliving components only. E. all components except animal life.
Spermatogenesis takes place in the ________:
a. prostate gland b. glans penis c. seminiferous tubules d. ejaculatory duct
The small air sacs at the tips of the bronchioles are the _________.
a) larynx b) glottis c) nasal cavities d) alveoli
A normally functioning pancreas produces insulin, a hormone that causes cells to ____.
A. produce glucagon B. take up and store glucose C. synthesize protein D. break down glucose E. produce glucagon