As a cell increases in volume, the relative surface area decreases and the demand for resources increases. This is not a good combination, as cells will not be able to get resources as efficiently. The surface area to volume ratio decreases, diffusion or the movement of materials in and out of the cell, happens at a slower rate. Formulas: Surface Area of a Cube = 6s2 Volume of a Rectangular Solid = lwh Surface Area to Volume Ratio = SA/V If you had a cell that was cube-shaped with a side length of 20µm, calculate the surface to volume ratio of the cell. Round your answer to the tenths place.

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

How does federalist, no.10 address the concerns of a strong national government in brutus i? a) the court system would be a representative democracy and the other branches republics. b) representative gov't was the only way to check state power in the national gov't. c) states would be allowed to choose which sort of representation they have at the national level d) the national gov't would be a balance between democracy and republic, thus protecting the rights of citizens.

If you observe an object in the universe that is roughly 8 megaparsecs in size, what is the object most likely to be? a. elliptical galaxy b. irregular galaxy c. ultra-compact dwarf galaxy d. galaxy group e. galaxy cluster