Compare the number of low income infants/toddlers to the number of high income infants/toddlers. What factor(s) listed above MIGHT NOT contribute to the

I. Increased immigration.
II. There is overall better nutrition
III. People have more access to better health care,
IV. Females have access to educational resources
V. Parental confidence in infant survival has increased.
VI. Epidemics spread rapidly through the population.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.