What force is caused by gas molecules and slows things down? answer ASAP! A. Air resistance

B. Pulling

C. Friction

D. Gravity

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

At the age of 6 months, caleb was diagnosed with tay-sachs disease. as his primary care physician, what would you tell his parents about this disease?