Which two molecules—crucial to life on Earth—do cyanobacteria provide?
What will be an ideal response?
Cyanobacteria provide oxygen (via photosynthesis) and nitrogen (via nitrogen fixation from the atmosphere).
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Cells that crawl rely mainly on ___________________ to facilitate their movement
A. microtubules B. microfilaments C. intermediate filaments
The feeding habits of lampreys are best
described as a. suspension feeding. b. predatory. c. parasitic. d. scavenging. e. all of these.
The method used to plot the divergence that arises between sister species as they evolve farther and farther from their common ancestor is termed ________
A) phylogenetically dependent contrasts B) phylogenetically derived contrasts C) divergence contrasts D) phylogenetically independent contrasts
Water can serve as a human reservoir of Vibrio cholerae.
a. true b. false