Which gland produces/releases hormones that have the widest range of effects on the body?
a. pineal
b. pituitary
c. thyroid
d. adrenal
e. pancreas
B
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Old pine stumps are dug up, split into pieces and sold as "fatwood". Fatwood is used as a fire starter. Why is this done?
A. The wood in the stumps is porous and dry, thus it burns easily. B. The high concentration of volatile organic compounds makes the wood flammable. C. Pine bark does not absorb water and is flammable. Clarify Question What is the key concept addressed by the question? Gather Content What do you already know about pine? What other information is related to the question? Choose Answer Given what you now know, what information 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 flow of hydrogen ions out of the thylakoid compartment:
a. provides energy to produce ATP molecules b. recharges the photosystems c. converts ATP into ADP d. causes excitation of chlorophyll molecules e. generates oxygen molecules
In order for something to be considered a skeleton, it must contain bone or some other hard substance.
Answer the following statement true (T) or false (F)
The Russian-American biochemist Phoebus Levene was the first to determine that nucleotides may contain one of four different nitrogen-containing bases. Levene believed that the nitrogen-containing bases occurred in equal amounts in DNA. What is the actual proportion of these bases?
a. DNA contains twice as much adenine and thymine as guanine and cytosine. b. All four do actually occur in equal amounts. Levene was right. c. DNA contains equal amounts of adenine and thymine, and equal amounts of guanine and cytosine. d. DNA contains equal amounts of guanine and thymine, and equal amounts of adenine and cytosine. e. DNA contains equal amounts of adenine and guanine, and equal amounts of thymine and cytosine.