Which are methods of reducing exposure to ionizing radiation? Check all that apply.
using a lead apron during medical X-rays
picking up radioactive material by hand to avoid dropping it
taking an X-ray image of large areas of the body at once
using a short burst of X-rays to take an image
taking an image of the smallest possible area

Why do you think the puppy litter was all dark-haired?

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.

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above