Answer: d. All materials needed for cell functions must pass through the cell membrane. brainliest?
Explanation:
Answer:
Do you mean the definition?
I think it is "population density". Population density is the number of individuals per unit area or volume.
Explanation:
A waste product is a product that is made but isn’t necessarily needed eg. A lightbulb will make light energy but it also makes a waste product heat.
Answer:
picture is of a heart
superior venacava bring deoxy blood to left ventricle which goes to lungs becomes oxygenated carried by atrium to heart which pumps blood to body
<span>. Some are deficient in some amino acids, that does not mean the aa's are absent, it only means that they are there in low concentrations</span>
