The normal microbiota compete with pathogens in a variety of ways to protect the body, creating a situation known as microbial (antagonism/competition/resistance)
What will be an ideal response?
antagonism
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Lateral inhibition requires:
A. production of an EPSP on the center interneuron. B. production of an IPSP on the adjacent interneurons. C. hyperpolarization of adjacent interneurons. D. All of the answer options are correct.
Stem cells ____
a. have the property of self-renewal by division b. are the least likely to give rise to cancer c. do not have the ability to divide d. are immature cells that become nerve tissue susceptible to cancer e. are found only in cancerous tumors
An individual mixotroph loses its plastids, yet continues to survive. Which of the following most likely accounts for its continued survival?
A) It relies on photosystems that float freely in its cytosol. B) It must have gained extra mitochondria when it lost its plastids. C) It engulfs organic material by phagocytosis or by absorption. D) It has an endospore.
Photophosphorylation differs from oxidative phosphorylation in that
A) it involves an electron transport chain. B) energy is stored in the form of a proton concentration difference. C) the final electron acceptor is NADP+ and not oxygen. D) its enzymes are membrane-bound. E) regeneration of ATP is driven by a flow of protons through an ATP synthase.