Which way of moving molecules across a membrane requires energy?

A. meiosis

B. diffusion

C. osmosis

D. active transport

Testing a hypothesis is called a (n) control scientific law experiment variable

A nerve signal is like a wave. How does this work? An electrical wave moves down the axon by electrons moving from the place the signal started to the place it ends up.

What type of science uses the ph scale

The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance?

Record snowfalls were recorded in the rocky mountains in 1997 following warmer - than - average water temperatures in the easthern pacific ocean. what likely caused the extra snow? A. An occluded front B. La Nina C. El Nino D. The jet stream

What is the difference expressed in kilograms between the mass of proton and the mass of electon?

A molecule from a new organism contains adenine, cytosine, guanine, and thymine. What molecules is being looked at?

In what pH range does phenol red change from yellow to pink

Given the generic chemical reaction below write the rate of the reaction

23 For a reaction at equilibrium, which change can increase the rates of the forward and reverse reactions?