Consider the biomass of the Jack pine trees in this pyramid. If the biomass of one Jack pine equals 12000 kg/m2/year, than what is the predicted biomass of the tertiary consumer level?

What cell is located on the surface of an endoplasmic reticulum?

What is a fossil? the remains of an animal or plant preserved within a layer of rock a large body of compacted ice formed over thousands of years the energy radiated from the Sun a change in the structure of Earth's surface

Which statement would best account for the difference in cost? O A. Cows in New Zealand are more efficient at producing milk. O B. New Zealand farmers feed their cattle more expensive grain. O C.

Do lakes always contain freshwater?

In an insect, a. nutrients are circulated through an open circulatory system. b. the blood vessels do not form a continuous circuit c. the fluid flowing through the heart is the same fluid that bathes the tissues. d.

An amoeba is a unicellular organism, which doesn't have a stomach for digestion of food. How does food storage and digestion take place in an amoeba?

Select all of the answers that apply. What major factors affected earth's changing climates?

How does mimicry influence the behavior of predators?

The surface of a bone that articulates with another bone (forming a joint) is covered with

Which part of the root contains transport tubes?