Decide whether each statement describes saturated fat, unsaturated fat, or both ; statement 1- contains nine calories per gram? statement 2- might increase ldl cholesterol levels? statement 3- maintain a good balance of cholesterol in blood? statement 4- examples include omega-6 and omega-3 fatty acids ? statement 5- absorbed by the villi of the small intestine? statement 6- solid at room temperature? what are the types of fat for each statement

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

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.

As scientist had investigated evolution from a variety fields they have found