D. <span>controlled
is the right answer because a</span><span>n </span>experiment<span> in which an observer tests a hypothesis by looking for changes carried by alterations to a variable.</span>
Answer:
mitochondria: <u>powerhouse of the cell</u>
Ribosomes<u>: the places where proteins are synthesized in our cells. </u>
nucleus <u>houses DNA;controls cell</u>
Vacuole: <u>holds waste and fluids from cell</u>
Ribosomes: <u>tiny organelles that contain RNA and specific proteins within the cytoplasm. </u>
Explanation:
Organelles make up the subunits of a cell. There are numerous each with their own function.
A,B,C and D
A. increase in the number of available neurotransmitters
B. decrease in the number of available neurotransmitters
C. increase in the number of receptors and receptor sites
D. the ability of the synapse to change in strength and function when the pathway is overused or underused
