Which statement is scientifically based? Mutations rarely occur.

All mutations are harmful.

Some mutations can be contagious, like infections.

Mutations are not passed from parent to offspring.

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

During convection, less dense fluid rises and denser fluid sinks.

Compare the parts of a cell and the cell as a whole to another common nonliving system (i. e., a car, a city, describe the parts of a cell and their primary function.