Trees have active transport, why?

Which biome occurs in the united states and once contained huge herds of grazing herbivores

What is the measurement of a population per unit area? The blank is the measurement of a population per unit area.

Which of the following factors would have the least effect on the carrying capacity of an ecosystem? a. the total number of organisms b. the available water supply c. the available food supply d. competitive exclusion

Why are satellites important?

Why does the density increase when salt is added to water?

When two different populations in a community benefit from their relationship with each other, the result is called?

You spill a small amount of a chemical (an acid) on the floor during lab. What should you do? O Ignore it until the end of class. O Sweep it up with a broom and a dustpan.

Why the plants in a space are grown in enclosed containers

What affects about 1% of chronic alcoholics and involves a defect in remembering recent events?

What is the most common method used to count a large species population? A. Estimating B. Sampling C. Guessing D. A pencil and paper