A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water. After an hour, what effect do you expect to observe?
A. No net change in cell weight
B. Water moves into the cell
C. Glucose moves into the cell
D. Glucose moves out of the cell
E. Water moves out of the cell
Answer: B
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During interaction between genes and environment, the phenotype ____
a. changes the genotype b. is expressed as discontinuous variation c. is variable and undergoes continuous change throughout the life of the organism d. can be quantitatively subdivided into genotypic and environmental components e. cannot vary
In the citric acid cycle, some intermediates are used in other metabolic reactions. Which of the following adaptations would need to be made by a cell in response to this?
A. Some oxaloacetate would need to be produced through an alternative pathway to combine with acetyl CoA. B. Cells would have to use energy sources other than glucose for metabolism. C. The citric acid cycle would eventually shut down when it ran out of intermediates and the cell would switch to glycolysis. D. Some citrate would need to be produced through an alternative pathway to combine with acetyl CoA.
Camouflage typically evolves as a result of
A) predation. B) interspecific competition. C) mutualism. D) herbivory.
With the exception of gametes, a human cell contains _________ chromosomes.
A. 23 B. 46 C. 47 D. 2n