Which statement is true for single-celled organisms? a. they are often harmless. b. they always cause disease. c. they only live inside humans. d. they reproduce in a complicated process.

Provide one reason why mitosis occurs.

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

Where can you find prokaryotic and eukaryotic cells?