Answer:
(B) It is better for the cell if most molecules are prevented from entering.
I hope this helped at all.
Answer:
the reactants of photosynthesis are water and carbon dioxide which react in the presence of sunlight to give out oxygen and glucose during the day
Sweat glands sorry if im wrong not sure
Natural selection is one of the basic mechanisms of evolution during which those variations in the genotype that increase organism's chances of survival and procreation are preserved and multiplied from generation to generation at the expense of those that are less advantageous. In this case the following are postulates of natural selection; Individuals with certain traits are more likely to survive and reproduce, individuals in a population vary more likely to survive and reproduce, survival and reproductive success are variable among individuals in a population and lastly some traits differences are heritable.
Answer:Phenolphthalein is a presumptive test that reacts with the heme molecule present in blood. A positive reaction gives a pink color. While bloodstains normally appear red-brown in color, the color of the substrate or the age of a stain may affect the appearance or visibility of the stain.
Explanation:
