During ______, the nucleus begins to break apart, releasing the duplicated chomosomes into the cytoplasm.
a) prophase
b) prometaphase
c) anaphase
d) metaphase
e) telophase
Ans: a) prophase
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A color-blind man has a son who is also color blind. The son inherited the condition from his
____________________. Fill in the blank(s) with the appropriate word(s).
The greatest metabolic advantage of a fish's two-chambered heart is
A. its ability to stay full of blood even as it is emptying into the conus arteriosus. B. its ability to pump blood to the gills for gas exchange before the blood is pumped to the remaining areas of the body. C. its ability to pump blood under high pressure to all areas of the fish's body. D. its ability to keep oxygen-rich blood in one chamber separate from oxygen-poor blood in the other chamber. E. its ability to maintain a constant blood pressure in the fish.
Which of the following apply to the demography of human populations today? (Check all that apply.)
_____ Our ecological footprint is decreasing. _____ We are using distributed resources disproportionately—less than 20% of us use over 80% of the energy. _____ We have plenty of resources still untouched. _____ We use almost half of the Earth's land. _____ We use over half of all renewable fresh water sources.
Which of the following changes will result in decreased blood flow to a tissue?
A. Decreased peripheral resistance B. Decreased vessel diameter C. Increased blood pressure D. Relaxation of precapillary sphincters E. Increased blood volume