Which statement is true?
A.) the heat released by an animal cell comes from the chemical bond energy present in the food molecules it metabolizes
B.) cells obey the first law of thermodynamics but are exempt from the second law
C.) the breakdown of food molecules generates heat, which cells then use to drive the synthesis of large molecules
D.) a cell generates order by decreasing the entropy of its surroundings
E.) a cell takes in heat from the environment to power its biosynthetic reactions, thereby obeying the second law of thermodynamics
Ans: A.) the heat released by an animal cell comes from the chemical bond energy present in the food molecules it metabolizes
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In subarctic saltmarshes, scientists have found that the addition of calcium has no effect on productivity, but additional iron does increase productivity. In this example, iron
A. is a precursor to calcium. B. stimulates evapotranspiration. C. biomagnifies in the marsh plants. D. is a limiting factor. E. blocks the effect of calcium.
Excessive ___________ production by skeletal muscles can be associated with pain and muscle fatigue.
Fill in the blank(s) with the appropriate word(s).
The bone marrow is where
A. antigen is filtered from the blood. B. antigen is filtered from tissue fluid. C. blood stem cells give rise to immature lymphocytes. D. immune responses to antigen occur. E. T-lymphocytes complete maturation.
Explain our present understanding of molecular adaptations to the cytoplasmic membrane that are present in psychrophiles
What will be an ideal response?