Which of the following objects is a burning ball of mostly hydrogen atoms?

a. an asteroid.

b. a galaxy

c. a star

d. a moon

This map shows how climate change might affect precipitation patterns in the Great Plains of the United States by the end of this century. Brown shows a decrease in precipitation, and blue shows an increase.

Which nucleic acid base is found in RNA but NOT in DNA?

True or false veins carry blood away from the heart?

What type of animal cell needs more energy

What is the main source of downward convection movement in the mantle

What word refers to traces of an organism that existed in the past?

Which of the following would likely extend the Earth's supply of a nonrenewable resource?

How many growing seasons do plants with herbaceous stems usually survive?

What is one advantage of having many small cells instead of one large cell? A. small cells do not have cell membranes B. with many small, cells you have more surface area C. small cells do not require a stable internal environment D.

What are some of the effects of the enhanced greenhouse effect?