Which is the hormone that stimulates growth by increasing cell size or rate of cell division?
A) calcitonin B) oxytocin C) tropic hormone D) growth hormone
Answer: D
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Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react? Check all that apply.
_____ Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria. _____ Bluegills would consume equal proportions of large Daphnia in all aquaria. _____ In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia. _____ The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases.
The illustration in the accompanying figure represents an early phylogenetic tree as depicted by ________
A) Dembski B) Wallace C) Lamark D) Darwin
Goiter, an abnormal enlargement of the thyroid gland, is caused by a dietary deficiency in:
A) tyrosine B) iodine C) potassium D) salt
Why might Neanderthals have been more affected by changes in food sources than H. sapiens?
A. Neanderthals were primarily meat eaters. B. Neanderthals had no ability to store food. C. Neanderthals had no tools with which to process food. D. Neanderthals could digest a limited number of proteins. E. Neanderthals required a greater number of essential amino acids.