Which of the following is not a common way signals are relayed between cells?
A. Contact-dependent signaling
B. Autocrine signaling
C. Direct intercellular signaling
D. Paracrine signaling
E. All of the above are ways signals are relayed between cells
E. All of the above are ways signals are relayed between cells
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Most of the daily international flow of money is due to
A) trade in goods. B) trade in services. C) the buying and selling of bonds, securities, currencies, and other financial instruments. D) tourism.
The unit of contraction that composes a muscle cell is called what?
a. troponin components b. myofilaments c. sarcomere d. sarcoplasmic reticulum
The carbon source for a heterotroph is
a. breathing carbon dioxide from the air. b. water. c. sunlight. d. ingesting organic matter. e. various inorganic molecules found in all ecosystems.
If a cell is no longer able to differentiate into any type of tissue, it has become _______
Fill in the blank(s) with correct word