69. Which of the following is an example of a heterogeneous m"guI 68. All of the following statements are true about a pure substanc
2.
it is a single kind of matter.
b.
it can be easily separated physically.
C.
it has a specific makeup, or composition.
d.
it can be an element or a compound

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Which of the following is not a defining characteristic of plants?

Why is it incorrect to say that mitochondria function only as energy factories with cell