Cyanobacteria ________
a. are ancient species that released oxygen during photosynthesis
b. can withstand exposure to boiling water
c. cannot perform nitrogen fixation
d. are thought to be very similar to the first cells in existence
a
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Sometimes, when Mendel crossed two pea plants with each other, he obtained a phenotypic ratio of 3:1 purple-flowered pea plants to white-flowered pea plants. These results are consistent with which set of parents?
A. homozygous purple pea plant and homozygous white pea plant B. heterozygous purple pea plant and homozygous white pea plant C. heterozygous purple pea plant and homozygous purple pea plant D. heterozygous purple pea plant and heterozygous purple pea plant Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about crosses and phenotype ratios? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The formation of proteins has been altered in a patients body by high temperature leading to the protein being broken down immediately after synthesis. The best description of this is
A. re-translation of proteins. B. post-translation is occurring. C. proteins are in a catabolic process. D. proteins are in a cotranslational process. E. proteins are engaged in an anabolic reaction.
Southern blotting is a technique for analyzing DNA. Indicate whether the statement is true or false
Why do pseudogenes evolve so much more quickly than other genes?
A. High rates of recombination in pseudogenes are often subject to unequal crossing over. B. Pseudogenes are processed more quickly because there are no enzymes present to check for replication errors. C. Transposable elements target pseudogenes as a site of insertion. D. They are not subject to purifying selection because mutations have no functional consequence. E. Directional selection causes rapid change in their sequence.