Which method of ATP generation by muscle cells requires oxygen?
a. aerobic respiration
b. anaerobic respiration
c. alcoholic fermentation
d. cellular respiration
Answer: d. cellular respiration
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Why is it necessary to have a standard for the interpretation of stable isotope ratios?
A) A standard is necessary to calculate how much radioactivity was added to a sample. B) A standard is necessary to determine the stable isotope ratio in the absence of biological activity. C) A standard is necessary to determine the weight of each isotopes. D) A standard is necessary to determine the age of the sample.
The outermost, weight-bearing part of limb bones is made up of ____
a. spongy bone b. compact bone c. yellow marrow
d. red marrow e. connective tissue
What could a mutation in a gene that controls cell growth and division lead to?
1.denaturation of proteins 2.cancer 3.errors in transcription 4.problems with DNA replication
To support the world population at the same standard of living as we have in the United States would require ________ times the resources that are available on Earth today
A) 2 B) 1.5 C) 20 D) 5 E) 10