During gas exchange, body cells
A) take up CO2 and release O2.
B) release O2 to red blood cells.
C) increase in size to accommodate the reuptake of O2.
D) release CO2 and take up O2.
Answer: D
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Which molecule is a disaccharide?
a. sucrose b. agarose c. glucose d. galactose
Which of the following statements is FALSE?
a. Crossing over tends to reduce the frequency that two linked genes are inherited together. b. Independent assortment of homologous chromosomes during meiosis increases variation. c. Crossing over leads to variation. d. Abnormal number or structure of chromosomes may influence the course of evolution. e. The closer together genes are found on a chromosome, the greater is a chance that crossing over will occur between them
Why are fats a better source of energy than carbohydrates on a per carbon basis?
a. Fats are comprised of other atoms besides carbon and oxygen that increase its ATP yield. b. Fats have more hydrogenbound in its fatty acid chains, which allows them to react more with oxygen. c. Fats do not completely break down, and the by-products increase ATP yield. d. Fats require fewer reactions with oxygen to completely break down, thus increasing its ATP yield. e. Fats require more reactions with oxygen to completely break down.
The chromosomes are aligned midway between the
spindle poles at a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.