<u>Answer</u>: There are numerous factors that influence the behavior and physiology of an individual animal/plant etc. By doing the study in their natural environment, you remove any possible bias caused by this.
Furthermore, an individual's behavior will differ in an artificial experimental setup compared to that observed in a natural setting. When possible, studying the subject in its natural environment is the best experimental method.
Animal cells<span> each </span>have<span> a centrosome and lysosomes, whereas </span>plant cells do<span> not.</span>Plant cells have<span> a </span>cell<span> wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas </span>animal cells do<span> not.</span>
He explained to me they represented the distribution of male and female intelligence. He speculated that male intelligence was the wider curve—the implication being that woman<span> may be a little </span>smarter<span> than </span>men<span>, on average, but most are just average. </span>Men<span> are more likely to be extremely </span>smart<span> or stupid.</span>
Erosion is brought about by the forces of nature or human activity: water, wind, earthquakes, mining, quarrying, etc. In the desert, there is very little water that can cause weathering or erosion, so the most probable answer is wind or maybe even animal activity.
C. nucleus is the part of the atom that has most of its mass
