All of the following are correctly matched "tissue system - function" except:
A. Ground tissue: anchors and provides support
B. Dermal tissue: protects plant
C. Vascular tissue: moves molecules and provides support
Ans: A. Ground tissue: anchors and provides support
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Genetic maps are based on recombination frequencies. Because both odd and even numbers of crossovers can occur between any two gene loci, as the physical distance between two loci increases, the maximum recombination frequency levels off at 50%. However, suppose you discovered a species where only an even number of crossovers can occur between any two gene loci. In this case, as the physical distance between two loci increases, you would expect the maximum recombination frequency to
A. remain at zero. B. increase with no limit. C. level off at 25%. D. level off at 75%. E. level off at 100%. 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 recombination frequency? 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?
Which of the following molecules is thought to have arisen first during evolution?
(a) protein (b) DNA (c) RNA (d) all came to be at the same time
Fluorescent in situ hybridization (FISH) probes are applied to intact cells and observed microscopically for the presence and location of
A. a specific genetic marker sequence. B. RNA. C. recombinant DNA. D. proteins. E. DNA.
John and all his brothers have no antibodies caused by non-functional B cells, thus they are highly
susceptible to bacterial infections. John and his brothers most likely have a condition called __________________. Fill in the blank(s) with the appropriate word(s).