An energy pyramid shows the ____

a. amount of organic material in the bodies of organisms at each trophic level
b. amount of energy that flows through each trophic level
c. biomass amount at each trophic level
d. amount of energy in an ecosystem, quantified by the base of the pyramid only
e. trophic levels that exist in a specific ecosystem


b

Biology & Microbiology

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Transformation of yeast:

A. requires the yeast cells to be made competent using calcium chloride and heat shock. B. requires adding an enzyme to digest the cell wall, creating a spheroplast. C. occurs any time free DNA is present; yeast cells are naturally competent. D. is not stable for fragments greater than 150,000 bp; only shorter YACs are maintained. E. in yeast spheroplasts occurs naturally and takes up DNA without any additional manipulation.

Biology & Microbiology

Which compound has the highest concentration in a cell?

A. Glucose B. NH3 C. CH4 D. CO2 E. H2O

Biology & Microbiology

Certain pathogens that infect the ____are discharged out of the body in the urine that these organs create

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Deletions and substitutions are two types of point mutations. Which is more likely to cause mistranslations of proteins?

Substitutions are more likely to cause mistranslations of proteins because they shift the reading frame and cause downstream amino acids to be changed. Deletions are more likely to cause mistranslations of proteins because one protein is deleted. Deletions are more likely to cause mistranslations of proteins because they shift the reading frame and cause downstream amino acids to be changed. Substitutions are more likely to cause mistranslations of proteins because one protein is substituted for another protein. None of the above is correct.

Biology & Microbiology