It is believed that war vessels in World War II carried the brown tree snake to the island of _. This invasive predator caused extinction of many local populations of birds and small reptiles.
A. Ceylon
B. Madagascar
C. Guam
D. Cuba
E. Puerto Rico
C. Guam
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You are excited because your lab is studying the first microorganisms retrieved from Mars! Interestingly, their genetic material consists of a single-stranded nucleic acid with six different nitrogenous bases. Like organisms from Earth, segments of the nucleic acid contain the code for making proteins. If the genetic code in these organisms was read in groups of 2 bases instead of 3, what is the maximum number of amino acids that could be coded for assuming that only one codon functioned as a stop codon? (Enter your answer as a numeral not a word, e.g. enter 17 not seventeen.)
What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the genetic code? 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 fossil record of the predatory whelk Sinistrofulgur and its bivalve prey Mercenaria suggests that both taxa coevolved over long periods of time
Which of the following—hypothetical—observations would pose the greatest challenge to the hypothesis that both taxa coevolved? a. Fossil whelks sometimes show broken shells from attempting to eat Mercenaria. b. There is no correspondence in the way size changes in both species throughout the fossil rec-ord. c. There are occasional whelk feeding traces on species other than Mercenaria. d. An innovation in whelk morphology is followed by more evidence of successful whelk feeding on Mercenaria.
Fats are composed of fatty acids and ________, which can both be metabolized for the production of ATP.
A) amino acids B) monosaccharides C) nucleic acids D) glycerol
Which of the following diseases is/are associated with organ-specific autoimmune disease?
A) autoimmune hypothyroidism B) juvenile (type I) diabetes C) systemic lupus erythematosus (SLE) D) autoimmune hypothyroidism and juvenile (type I) diabetes