What is it called when changes occur in an ecosystem that already exists? *

a. primary succession

b. secondary succession

c. pollution

A metal sphere rests upon the exact center of a level, square table top. The table is sitting on the floor. Andrea knows the mass of the sphere; what other measurement does she need to calculate the potential energy of the sphere?

Which would least likely be seen on an information pamphlet for red tide? People tend to stay out of the water in the area of a red tide. People are warned to avoid eating shrimp and lobster.

While discussing pathogens that attacked gymnosperms, Dr. Smith used the name white fir to describe the tree illustrated here.

The arm or forelimb of humans, horses, goats, and mice all exhibit the same three bone structures: humerus, ulna, and radius.

Which is the main light-absorbing pigment for photosynthesis?

How macromolecules are broken down and used to make new molecules.

How do soils form? A. Plants cement mineral particles together to form soil. B. Plants provide organic matter and minerals to make soil. C. Erosion transports mineral particles, and plants die and decay. D.

Give three examples of places bacteria live.

How can scientists learn from observations

The minimum amount of energy the body uses at complete rest is known as the energy balance. resting metabolic rate. metabolic balance. basal metabolic rate.