Since there are no choices, it will be difficult to answer your question.
Let's say these are the choices:
A. The liquid is a pure substance because it is colorless.
B. The liquid is a mixture because its temperature rises.
C. The liquid is a pure substance because it remains liquid when cold.
D. The liquid is a mixture because it has a gas dissolved in a liquid.
your answer is D. The liquid is a mixture because it has a gas dissolved in a liquid.
Its A. it prevents sperm from reaching the egg and fertilizing it.
The focea centralis functions to promote daytime vision, being the site of concentrated photoreceptors called cone cells.
Given what we know about nutrition, we can confirm that the runner's meal would have to contain 30 grams of protein.
The runner in question wishes to complete a two-hour run while expending 4kcal or calories <u><em>per minute</em></u>, for a total of 480kcal. Furthermore, the runner wishes for only 25% (120kcal) of this energy to come from a source of protein.
Since <em><u>every gram of </u></em><em><u>protein </u></em><em><u>adds </u></em><em><u>4 calories </u></em><em><u>of energy to the meal</u></em>, and we have to account for 120 calories, the runner will have to consume 30 grams of protein to achieve the desired results.
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