Chemical communication between the nucleus and the cytosol occurs through ________.
Fill in the blank(s) with the appropriate word(s).
nuclear pores
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Which of the following is characteristic of cilia?
A. They move substances in any direction across cell surfaces. B. They are substantially longer than flagella, and are most easily seen in human sperm cells. C. They are used for cellular adhesion. D. They are whiplike, motile cellular extensions that occur in large numbers on the exposed surfaces of certain cells.
The two organ systems that work together to regulate most aspects of the body's water balance are
A) cardiovascular and respiratory. B) urinary and cardiovascular. C) digestive and cardiovascular. D) urinary and respiratory. E) digestive and respiratory.
All of the following items are composed of matter except which one?
A. All of the answer choices have matter. B. The air we breathe C. The fumes emitted from a vehicle D. The steam formed from boiling water
What does the semicircular canals do?