Which of the following is the best example of an ecosystem? A. a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore B. bees and wasps around a group of purple cornflowers C. a school of sunfish

What is the process by which bacteria convert nitrogen gas in the air to ammonia and nitrates which can then be used by plants?

Identify or List each of the organs which plays a role in the digestion of food through the body in order

Which of the following are true of sedimentary rocks? Check all that apply! They come from magma. They are formed from the natural processes like wind and water called 'weathering'. Tiny pieces of rocks are called sediments.

Elasticity in polymers is generally related to the amount of hydrogen bonding between different parts of the polymer. True False

Movements that follow a major earthquake often produce smaller earthquakes called

What does "standing jefferson on his head" have to do with the populist platform?

In which body or cell area are most genes in humans located?

Where are the sensory receptors for sound? the tongue the nose the ears the eyes

Which is a characteristic of the littoral zone of lake erie?

In a small, isolated population of piranhas, one individual is born with a synonymous mutation in a gene that codes for the beta-globin protein found in hemoglobin. After five generations, 5% of the piranhas carry this mutation.