Which of these statements about cancer is false? malignant cells contain oncogenes that affect cell growth, differentiation, or division secondary tumors are metabolically active and can stimulate the growth of blood vessels into the area cells in a malignant tumor maintain normal controls over their activities and locations cancer is a disease characterized by malignant cells, which often change shape and size?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

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 eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?