Density-dependent inhibition is a phenomenon in which crowded cells stop dividing at some optimal density and location. this phenomenon involves binding of a cell-surface protein to its counterpart on an adjoining cell's surface. a growth inhibiting signal is sent to both cells, preventing them from dividing. certain external physical factors can affect this inhibition mechanism. select the statement that makes a correct prediction about natural phenomena that could occur during the cell cycle to prevent cell growth.

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?