Explain how oxygen enters your body and is used. Make sure you mention the organs used, chambers of the heart and in which direction the blood goes.

Which of the following would most quickly devastate a human population? A flu virus breaking out in a large office building or school A deadly water-borne microorganism in a city's water source A genetic disorder found in a population of average

Repeated flooding of streams and rivers will form natural levees alluvial fans deltas eutrophication

Which of the following is the best description of an adaptation? A. a trait that was beneficial to survival in the past B. a trait that is of no advantage to survival C. a trait that will be beneficial in the future D.

The gradual process in which species in one stage of community development are replaced by different species is termed biome evolution.

During a stressful or threatening situation, which of the following is the best description of how the nervous systems in your body would respond? A.

What is natural gas

A reaction in which products can react to re-form reactants is a. reforming b. reversible c. buffered d. impossibnle at equilibrium a. the forward reaction rate is lower than the reverse

Why is it so important to be ethical in conducting the scientific method process?

How did Mendel make crosses with his plants? A., He planted the seeds of each type together, and they grew into a single plant. B., He cut the peas in half and combined them to grow a single plant. C.

Marissa is studying the solar system. which object in the solar system is a star? A. the sun B. saturn C. Earth's moon D. a comet