D. Polarity and size.
<span>The size, polarity, and charge of a substance will determine whether or not the substance can cross the cell membrane by diffusion. The cholesterol was an example of a lipid, and is highly soluble in the nonpolar environment of the lipid bilayer. You saw, in the animation above, the cholesterol freely passing into the hydrophobic environment of the membrane. Cholesterol distributes freely in the membrane and then some fraction will dissolve in the aqueous environment of the cytoplasm. Water, on the other hand, while polar, is small enough to cross the membrane at a slow rate. Note that specialized transport proteins in certain cell membranes can provide a channel for the water, greatly increasing its rate of crossing the membrane. The lipid bilayer is much less permeable to the ion, because of its charge and larger size. As a general rule, charged molecules are much less permeable to the lipid bilayer.</span>
A 2nd-century hysteria was caused by the belief that the uterus could move freely within the body in search of fluid and cause specific symptoms depending on the areas the uterus was displaced to. Called the wandering womb disorder, the womb was believed to be a living thing within a living thing.
Elephant organism => classifying Organism
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Pseudoscience may sometimes permit personal opinions as evidence.
<h3>What is pseudoscience?</h3>
The term pseudoscience refers to the reliance on logical explanations rather than empiricism to explain the observations in the universe. We know that science is empirical and results must be reproducible.
It is important to emphasize that the difference between science and pseudoscience is that science has an emphasis on empiricism and experiments are the only way that we could validate. Most of the earliest approaches to the study of the universe depended on pseudoscience.
The study of the natural world is the concern of both science and pseudoscience. The explanations in pseudoscience may sound logical but the results generated by science can be tested by others. The explanations of science can be proven false.
Lastly pseudoscience may sometimes permit personal opinions as evidence.
Learn more about pseudoscience:brainly.com/question/12257058
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