In science, theories ______.

A. once proven, can never be rejected.
B. can tie together a larger number of observations that previously seemed unrelated
C. apply strictly to biological phenomena
D. have limited explanatory power


B. can tie together a larger number of observations that previously seemed unrelated

Biology & Microbiology

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Mycorrhizal fungi interact with plants at the

A. cuticle. B. edge of ponds. C. stomata. D. seed coat. E. roots.

Biology & Microbiology

The sickle cell allele is spread through the population in West Africa and maintained at a high

frequency due to ____________________ advantage. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The resolution of a light microscope is determined by the equation

a. R = 0.61(?)(NA) b. R = 0.61(NA) divided by (?) c. R = 0.61(?) divided by (NA) d. R = 0.61 divided by (?)(NA)

Biology & Microbiology

Some organisms are capable of orchestrating alterations that are collectively termed antigenic variation. This allows the organism to __________.

A) rapidly move through the host's tissues B) drastically decrease its ID50 C) enter the host's body through more than one portal of entry D) evade the host's immune system

Biology & Microbiology