Digger wasps orient using
A. pheromones.
B. sight.
C. solar bands.
D. smell.
E. pheromones and solar bands.
B. sight.
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Which of the following is NOT a hallmark of cancer?
A. Cell division in the absence of growth signals. B. Resistance to signals that slow cell division or promote death. C. Metastasis, which allows invasion of local tissues. D. Ability to stimulate growth of blood vessels to provide nutrients to the rapidly growing tumor. E. All of these choices are hallmarks of cancer.
In the lactose operon, the repressor gene binds to:
A. the lacI coding region. B. the promoter. C. the operator. D. the lacZ coding sequence. E. the lacY coding sequence.
Choose the item in column 2 that best matches each item in column 1.
A) diffusion and passive and active transport B) both passive and active transport C) diffusion D) active transport E) none of the listed processes F) both diffusion and passive transport G) indirect active transport H) passive transport 1) requires a specific integral membrane protein 2) dependent on solubility properties of the solute 3) requires cellular expenditure of energy 4) Keq = 1 5) Na+/glucose symport 6) Na+/K+ pump 7) exclusively involves the transfer of small, nonpolar molecules 8) applies only to ions 9) ?G° = 0 10) direction of transport is dependent upon the concentration gradient at any given point in time 11) requires ligand binding and therefore Michaelis constants can be calculated
The evolutionary phenomenon known as reinforcement is most likely to occur when which of the following already exists?
a. A geographical barrier that separates two populations of the same species b. Prezygotic isolation between two different species c. Postzygotic isolation between two different species d. Gene flow between two separate populations of the same species