What are the difference between an observation and an inference

When do animals cooperate with one another

If our circulatory system carries white blood cells and circulates water in blood plasma, why do you think we need a lymphatic system?

This is the outer layer of a plant cell. It supports the cell

What are the monomers of Carbohydrates

What is the leading cause of death in cats?

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?