Many archaeal genomes include chromosomes and plasmids.
Answer the following statement true (T) or false (F)
True
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The aspect of human evolution in which the genes microcephalin and ASPM have been implicated is the
A. evolution of our large frontal cortex. B. evolution of language. C. evolution of bipedal locomotion (walking upright). D. evolution of an opposable thumb. E. the evolution of mother-infant bonding
Impressive was a champion Quarter Horse stallion with a magnificent muscular physique, a trait that he passed on to dozens of offspring. However, many of Impressive's offspring developed periodic muscular twitching that sometimes left the horses temporarily unable to move. Some horses even died. As it turns out, Impressive's award-winning physique was due to a mutation in a single, protein-encoding gene, resulting in hyperexcitable muscle (which contracts even in the absence of a stimulus from its motor neuron). Which is NOT a plausible explanation for the identity of the abnormal muscle protein in Impressive and his offspring?
A. tropomyosin that is unable to bind to actin B. acetylcholine receptors that function in the absence of acetylcholine C. over-active troponin molecules D. leaky Na+ channels E. overactive Ca2+ pumps in the membrane of the sarcoplasmic reticulum Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about excitation of muscles? What other information is related to the question? Choose Answer · Given what you now know, what information is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
If you expose a photosynthesizing plant to water that contains both radioactive H and radioactive O, in which of the products of photosynthesis will the radioactive H and O show up?
A) H and O both in glucose B) H in glucose; O in water C) H in water; O in glucose D) H in glucose and water; O in O2
The root-shoot axis of plants
A. is determined by sunlight, as roots grow away from the sun and shoot grow toward the sun. B. is determined by three axes. C. is determined by the orientation of the first zygotic cell division. D. develops in segments. E. None of the answers are correct.