What is one drawback of using evidence found in rock layers to determine a relative history of the earth? 1. not all organisms leave fossils

2. not all layers contain salt deposits

3. all areas of earth have distinct rock layers

4. rock layers are never disturbed

Both male and female gametes are created during the process of meiosis. the formation of male gametes is called spermatogenesis. after telophase il of spermatogenesis, there would be are all genetically male gametes created that

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.

Which measure of an earthquake depends on how close you are to the focus?