What Best Explains the Double-Headed Arrows Associated with Water, Carbon

question 29

Multiple Choice

What best explains the double-headed arrows associated with water, carbon dioxide, and molecular oxygen shown in the illustration below?

• A)Each molecule is unable to cross the membrane, but can be found in relatively large numbers on both sides.
• B)The membrane is permeable to these small molecules and they enter or leave rapidly as their concentration gradients change.
• C)An isotonic condition exists for each molecule, so no net movement takes place.
• D)Homeostasis requires that surplus molecules entering the cell be rejected and returned to the outside.

---

Definitions:

Level Of Significance

The level of significance, often denoted by alpha, is a threshold set for deciding whether to reject the null hypothesis, typically set at values like 0.05 or 0.01.

Rejection Region

The rejection region is the range of values in hypothesis testing that leads to the rejection of the null hypothesis if the test statistic falls within this range.

Robust Estimator

An estimate method that is not overly sensitive to outliers or violations of assumptions by the underlying data-generating process.

Normality

In statistics, a condition in which a distribution approximates the normal distribution, characterized by a bell-shaped curve.