Why is the transfer of energy in a food chain usually only about 10 percent efficient?

The trapping of heat energy by the atmosphere and oceans maintains the Earth's: a. temperature range c. climates b. weather patterns d. air quality

Orcas, or killer whales, are natural predators of sea otters. It has been observed that in regions where the sea otters are not present, sea urchins grow rapidly and destroy much of the natural kelp vegetation.

Draw and label the lower respiratory system

How does pollution affect marine life?

Describe the relationship of the Earth's lithosphere to the asthenosphere. The asthenosphere is composed of rigid plates that "float" on top of the lithosphere. The lithosphere is composed of rigid plates that "float" on top of the asthenosphere.

Which is more likely to be dangerous-a volcano that erupts frequently or a volcano that has been inactive for a hundred years? Why?

Why are the chemicals in photosynthesis and cellular respiration the same?

What is the mass of the sun guess

Oxycontin abusers are typically young white males. a. True b. False

A species displaying which of the survivorship curves is likely to produce the most offspring?