Productivity of an ecosystem is best determined by the

A. total amount of biomass in the system

B. number of individuals of each species

C. number of species present in the ecosystem

D. total photosynthesis each year

The thickest part of crust occurs in

What is a divide in topography

If a is a negative number and b is I positive number, what number is always negative?

If you lived on the Equator, you would be able to see the Big Dipper rise and set in the night sky Select one: True False

How many planets in our solar system have moons?

Eight pounds of potatoes cost $4.72 how much will 30 pounds cost

Ice hotel facts? in sweden

Compared with the land in the highlands, the lowlands region of England is___. A) Rockier and more difficult for farming B) The center of business and industry C) Richer in coal reserves D) Covered by more fertile farmland Answer: D) Covered by more

What are the three main types of erosion caused by glaciers?

How do we know that africa was the birthplace of the earlist humans