Are where exchange of materials with surrounding cells occurs.

veins

arteries

capillaries

none of the above

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

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?