The axis that determines the pattern of your hand in the direction from your thumb to little finger is the __________ axis.
A. dorso-ventral
B. antero-posterior
C. right-left
D. digital
E. radial
B. antero-posterior
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How do fossils provide evidence of evolutionary history?
A. Fossils provide an accurate account of the number of species that exist at any particular time. B. Older fossils are an excellent source of DNA from which we can construct molecular phylogenies. C. Fossils provide a record of extinct species. D. Fossils provide complete information on extinct species.
A useful hypothesis typically accomplishes these two things:
A. it is falsifiable and clear B. it clearly establishes a null hypothesis and it generates a testable prediction C. it can be easily disproved and will be considered a theory if not disproved D. it frames an experiment that can shed light on the observation and guides design of the experiment
When aerosols containing pathogens spread disease from a distance of less than one meter, it is considered
A) vector transmission. B) waterborne transmission. C) contact transmission. D) airborne transmission.
The __________ that facilitates cytokinesis in animal cells cannot work with plant cells because a stiff cell wall surrounds their __________.
Fill in the blank(s) with the appropriate word(s).