Which generation of pea plants yielded the most significant results during Mendel’s experiments?
a. P0
b. F1
c. F2
d. F3
c. F2
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Lipid rafts are
A) regions of the membrane that are high in sphingolipids, which facilitate communication with the external environment of the cell. B) important regions of membrane structure and are comprised of phospholipids. C) regions not typically associated with signal transduction. D) regions where greater concentrations of sphingolipids are on the inner side of the membrane. E) great for white-water rafting.
When comparing the genetic characteristics between embryonic and adult stem cells, embryonic stem cells
A. are collected from the testes and ovaries, while adult stem cells are collected from other tissues. B. are produced naturally in human development, while adult stem cells are from cloning. C. There is no real genetic difference between embryonic and adult stem cells, except how they were collected. D. can't differentiate into any specialized cells, while adult stem cells can. E. can differentiate into any specialized cells, while adult stem cells can't.
If the decolorizer is not left on long enough in the Gram-staining procedure, Gram-positive organisms will be stained ________ and Gram-negative organisms will be stained ________.
A. purple; purple B. purple; colorless C. pink; pink D. purple; pink
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.