Which term describes the difference in the concentrations of a substance across a cell's membrane?

An atom of nitrogen has 7 protons how many electrons does it have

Which of the following is a statement about weather? The weather in Seattle tends to be rainy. The tropical rain forest has high annual precipitation. The forecast says the temperature will be 80°F tomorrow.

5. 5. There are a lot of endangered animals in this world, and the numbers are increasing constantly as their habitats are destroyed by global warming and urbanizing humans.

Cube A has a surface area to volume ratio of 0.5:1. Cube B has a side length of 20 mm. 1. Calculate the surface area and volume of Cube B. (2 marks)

Why is this fuction Important to an organism?

In this biome you will find many evergreens tree. They don't lose their leaves and they are triangle shaped so their branches won't hold snow and break. This biome is found in Canada and Russia what biome is this?

The drought alone did not cause the dust bowl. It was combination of several things, the drought and

Ecology is made up of

Why does a temperature inversion trap smog and prevent it from dispersing

Turgor pressure is the result of: A) the activity of the contractile vacuole. B) water accumulation within a cell. C) the rigidity of the plasma membrane. D) All of these choices are correct.