When water molecules form into ice, ____
a. the water molecules jiggle more
b. their structure becomes less rigid
c. the water molecules pack less densely
d. hydrogen bonds between water molecules readily break
e. evaporation of water molecules happens more readily
ANSWER: c
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You examine the chromosomes from a somatic cell nucleus of a human individual. That nucleus contains a Y chromosome and a Barr body. Which of the following is ACCURATE?
A. The individual is a female because there is a Barr body. B. The individual is a male because there is a Y chromosome. C. The individual has Klinefelter Syndrome. D. The individual is a male with Klinefelter Syndrome. E. The individual is a female with Klinefelter Syndrome.
If a person inherits two X chromosomes, this individual will be
A) female. B) male. C) color-blind. D) sterile. E) a poly-X female.
There are over 11,500 species of these protists that have ornate, glasslike shells.
A. green algae B. diatoms C. brown algae D. red algae
The circulatory system of bony fishes, rays, and sharks is similar to
A) that of birds, with a four-chambered heart. B) the portal systems of mammals, where two capillary beds occur sequentially, without passage of blood through a pumping chamber. C) that of reptiles, with one pumping chamber driving blood flow to a gas-exchange organ, and a different pumping chamber driving blood to the rest of the circulation. D) that of sponges, where gas exchange in all cells occurs directly with the external environment. E) that of humans, where there are four pumping chambers to drive blood flow.