3. What impact do the amounts of available energy, water, and

oxygen have on an ecosystem?

(1) They act as limiting factors.

(2) They are used as nutrients.

(3) They recycle the residue of dead organisms.

(4) They control environmental temperature.

What is the dependent variable in this statement? " Pools with dark pool tile heat up faster (i. e., have a higher temperature) in the spring than pools with light colored pool tile."

If the dorsal root of a reflex arc controlling arm movement is severed, what part of the nerve pathway will block the nerve impulse? Motor neuron Sensory neuron Interneuron Receptor

1. What is the Carbon Cycle?

These blotches are called what? The layer of the Sun where these occur is called the what?

What tells a ribosome to start making a protein

Heart disease is the leading cause of death among both men and women in the United States. It is usually caused when a sticky substance called plaque builds up in the arteries. Often, the only symptoms of heart disease are chest pain or discomfort.

Is the following sentence true or false? Weather is the average condition of the atmosphere in a particular place over a period of many years

How many cells make up a unicellular organism? one two three more than three

The cell membrane has many proteins embedded in it. These proteins have many different functions ranging from transport of materials to cell surface identity markers. True False

The secretions of the gallbladder, liver, and pancreas enter the