Regions of the earth inhabited by living organisms are known collectively as
a. the atmosphere
b. the biosphere
c. the stratosphere
d. the lithosphere
e. None of the above
b. the biosphere
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Using the techniques of genetic engineering, you design a cytoplasmic protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to
A) do nothing; all proteins go through the ER. B) incorporate the appropriate mannose-6-phosphate groups. C) incorporate the appropriate DNA sequence with the proper signal. D) incorporate radioactive amino acids into the protein. E) incorporate the appropriate lipid groups into the lipoprotein.
Explain how the Linnaean system of classification, although developed without any concept of
evolutionary theory, provided a reasonable, if not perfect, framework for later application of evolutionary systematics. What limitations of the Linnaean system have spurred cladists to argue for its abandonment and replacement by modern cladistic approaches?
What will be an ideal response?Cleavage produces a(n) __________ stage embryo. Fill in the blank(s) with the appropriate word(s)
If a man and his wife are both homozygous for a disease-causing recessive gene, then
____________________ of their children will be affected. Fill in the blank(s) with the appropriate word(s).