What type of ecosystem process is a volcanic eruption?
a) geological
b) chemical
c) biological
d) human
Ans: a) geological
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A scientist makes three artificial mRNA strands:
(x) 5' AAAUUUAAAUUUAAAUUUAAAUUUAAA 3' (y) 5' UUUCCCUUUCCCUUUCCCUUUCCCUUU 3' (z) 5' AUAUAUAUAUAUAUAUAUAUAUAUAU 3' When he analyzes the polypeptides produced, he finds that: x produces a polypeptide that is 50% phenylalanine and 50%lysine. y produces a polypeptide that is 50% phenylalanine and 50% proline. z produces a polypeptide that is 50% isoleucine and 50% tyrosine. Based on these results only, the best conclusion to make is that A. AUA codes for isoleucine B. AAA codes for phenylalanine C. AAA codes for lysine D. AAA codes for lysine and AUA codes for isoleucine E. AAA codes for phenylalanine and AUA codes for isoleucine 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 · Consider the different answer options. Which can you rule out? 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?
If you isolate a pancreatic beta cell and put it in the proper growth conditions, it will divide by mitosis and produce new beta cells, but it will not produce pancreatic alpha cells or pancreatic cells that release digestive enzymes. The pancreatic beta cell is
A. totipotent B. impotent C. unipotent D. multipotent E. pluripotent
In the 1940s, the population of whooping cranes in North America neared extinction, with fewer than 30 birds surviving. The population has since expanded to several hundred birds today
It is likely that these several hundred birds will exhibit very little genetic diversity. This is an example of A) biogeographical distribution. B) the bottleneck effect. C) random mutation. D) population effect. E) immigration.
T lymphocytes mature in the (bone marrow/lymph node/thymus)
What will be an ideal response?