One effect of desertification is

a. decreased amounts of salt in the soil

b. increased amount of vegetation

c. increased chance for erosion

d. increase in average rainfall

The conversion of ___ from a producer into a consumer is not efficient

Why is an ecosystem never constant?

What byproduct of nuclear energy has caused concerns about the use of this resource and why?

What do you think the future of antibiotics is?

What researcher developed the theory of use or disuse, also called the theory of acquired characteristics? Darwin Lamarck Malthus

Which body action is unlikely to occur during a fever? a. Shivering b. Decrease in heart rate O C. Flushed cheeks d. Sweating e. Increase in respiration

A group of cells that have the same function is called a (n).

The atmosphere of Earth contains primarily which gas? A.) Carbon dioxide B.) Methane C.) Oxygen D.) Nitrogen

Which organism is the primary consumer in this food chain? Oak tree squirrel owl and eagle

Which of the following is NOT caused by gravitational force? A. Gas and dust come together and form a planet. B. Stars cluster together to form a galaxy C. Planetes orbit a star D. Two atoms come together to form a molecule