Which of the following organisms is NOT part of a trophic level?

a. decomposers

b. consumers

c. sunlight

d. producers

Gametes have A) homologous chromosomes B) twice the number of chromosomes found in body cells C) two sets of chromosomes D) one allele for each gene

Explain why species with a diverse gene pool are usually less threatened by environmental change than are species whose members all have similar genes.

Creatures that reproduce asexually do so through what?

Squirrels and chipmunks compete for the same food source. What is most likely to happen to the degree of competition between these two species if their food became scarce? decrease increase stay the same disappear

What sphere dose water flow

Which is NOT a characteristic of most organelles? A. Lack a surrounding membrane B. Found in animal and plant cells C. Perform a specific function D. Are miniature organs

What are the roles of the axon and dendrite?

Which statement best explains why compounds have different properties than the elements that form them? a. When elements form a compound, the bonds and structure of the elements change. b.

What part of your brain controls all mental activities? brain stem medulla cerebellum cerebrum

Which can be an indicator of ecosystem health? a. climax communities b. ecosystem decline c. biodiversity d. endemic