A cell releases chemical signals into its surrounding space in order to communicate with neighboring cells. Which of the following must occur for the communication to be successful?
A) The chemical signal must bind to hormones on the neighboring cells
B) The same chemical signal must be produced within the neighboring cells
C) The neighboring cell must have the receptor to receive the signal
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The hydrogen ion gradient across the thylakoid membrane is required to ________________
What will be an ideal response?
What carries the signal between a neuron sending a message and the neuron receiving it?
a. threshold value b. action potential c. neurotransmitter d. neurohormone e. resting potential
A group of individuals born in the same period of time is called a(n) ________
Fill in the blank(s) with correct word
The key point in Darwin's proposal is that the ________ imposes the conditions that determine the direction of selection.
A. gene B. parent C. environment D. individual