Red blood cells
a. transport respiratory gases
b. combat bacterial infection
c. destroy viruses
d. transport cholesterol
Answer: a. transport respiratory gases
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A hydrogen bond is
a. a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. b. a sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. c. an attractive force that involves a hydrogen atom and an oxygen or a nitrogen atom that are either in two different molecules or within the same molecule. d. found only in water molecules. e. is the strongest form of chemical bond.
A male has been tested, and his sperm seem to be normal. They are motile and seem to be surviving for the appropriate amount of time. However, the sperm don't seem to be able to fertilize an egg
What part of the sperm is most likely to be malfunctioning? A) the tail B) the head C) the midpiece D) the acrosome
Which of the following experimental techniques involves treating a genetic disorder by replacing a defective gene with a functional gene?
A.) genetic screening B.) bioinformatics C.) genomics D.) gene therapy
Suppose a gardener puts a chemical on the soil that kills off all the detritus feeders and decomposers. What would happen to the garden?
What will be an ideal response?