Select the correct answer from each drop-down menu. humans use many chemical substances for farming that consequently affect biodiversity. these compounds, which are rich in nitrogen and phosphorus, are used to fertilize crops. excessive use of these compounds causes , which leads to in bodies of water.

Dna replication or repair occurs in a cell in all of thw following situations except when

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.

20 how are energy cycles and growth cycles related?