Explain why a concentration gradient across a membrane represents potential energy.

To get isolated colonies on a plate, only about 300 cells can be in the inoculum. what will happen if the cell density of the incolum significantly exceeds this number

In general, the more physical activity individuals do, A the more intense the exercise needs to be B. the more money they will save on disting C. the more television they will be able to watch D.

The body is kept fairly constant by automatic responses controlled by which of the following? A Hypothalamus of the brain B Size of the heart C Covering of the body D Amount of skeletal muscle

Scientists have learned a great deal from studying and using stem cells. Which diseases/disorders are not involved in stem cell research?

Can any one organism in the food web be a consumer, an omnivore a predator and a pr Justify your answer?

Circuit A has a 3 Ω resistor running on a 9V battery. Circuit B has a 0.5 Ω resistor running on a 3V battery. Which of the following circuits would have a higher amperage?

What is not an important factor or factors affecting coastal landform changes as a result of sea level rise today?

What is an example of a renewable resource that needs to be closely managed

What does fitness mean in terms of evolution?

Definition: this refers to an increase in some quantity over time. in organisms, this is a result of mitosis.