Anatomical and molecular evidence suggests that animals may have evolved from a protist similar to a ___________.
a. charophyte
b. chlorophyte
c. dinoflagellate
d. apicomplexan
e. choanoflagellate
Answer: e. choanoflagellate
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The biggest limitation of traditional light microscopy and electron microscopy methods is that they are unable to reveal
A) absolute cell concentration. B) cellular components of small microbes because of the limits of magnification. C) genetic and functional diversity of microorganisms in the habitat under study. D) physical microbial interactions as found in nature.
The largest group of proteobacteria are the ________.
A. delta proteobacteria B. beta proteobacteria C. gamma proteobacteria D. alpha proteobacteria
The phenotypic ratio expected from a dihybrid cross involving complete dominance is
A) 121. B) 931. C) 9331. D) 41.
Bulk flow in capillaries is driven by ____
a. gravity b. concentration gradients c. actual blood pressure d. pumping of the heart e. reciprocal exchange with oxygen