Large area of land characterized by the plant and animal communities that live there

a. biosphere

b. biome

c. ecosystem

d. population

What is the bone that makes up the center of the skeleton

As a car is driven around burning gasoline, what is released into the atmosphere?

Which three components are common to all amino acids

The center of the DNA molecule, the rungs of the ladder, are composed of A. phosphates only. B. nitrogenous bases only. C. phosphates and sugars. D. nitrogenous bases and sugars.

If 20% of a DNA sample is made up of thymine what percentage of the sample is made up of cytosine

Describe the factor that affect blood pressure

What is true about one strand of DNA? Question 3 options: It contains many proteins. It contains many alleles. It contains many chromosomes. It contains many genes.

Write a paragraph to explain the steps of metamorphasis using the words adult, egg, larva, body parts, grow, rearange, and life cycle

The process of creating a current in a circuit by changeing a magnetic field

Explain why the fact that invasive species did not co-evolve with the native species unbalances an ecosystem.