Histone tail modifications establish and maintain the different chromatin structures found in heterochromatin and euchromatin.
a. true
b. false
Ans: a. true
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Specialized cell surface proteins on the neck of Mycoplasma mobile allow for ________.
A. "rolling" motility B. "inchworm" motility C. flagellar motility D. gliding motility
What are the key characteristics of arthropods?
A. Fused bodies, no exoskeleton, and jointed appendages B. Segmented bodies, tough exoskeleton, and jointed appendages C. Segmented bodies, no exoskeleton, and jointed appendages D. Fused bodies, tough exoskeleton, and jointed appendages
Repeated stimulation of a motor unit over a short period of time leads to
a. fatigue. b. tetanus. c. increased muscle strength. d. muscle twitch. e. increased ATP production.
Imagine that every person on Earth had an ecological footprint the size of an average Haitian person's ecological footprint. Which of the following is a potential result?
a. we would quickly run out of renewable and nonrenewable resources because we would have to use even more fossil fuel to support our energy demands b. we would exceed the biocapacity of Earth c. it would take the equivalent of about four Earths to support all of us d. our effect on Earth's resources would be at a much more sustainable level than it is currently e. a, b, and c are all potential results