Enzymes act as catalyst because ...

They raise the activation energy

They lower the activation energy

They use activation energy

They maintain activation energy

Distinguish between an object that is truly weightless and an object that is weightless because it is in free fall.

What tube takes food to the stomach

Which part of the body has the highest percentage of fungal infections?

Why would a grassland ecosystem have more primary consumers than a forest ecosystem? A - Trees are too large to be eaten by herbivores. B - Grass is easier for herbivores to digest. C - Trees produce fewer calories than grass.

Do you think it's wise for scientists not to accept a theory immediately, even if the theory has alot of evidence to support it?

What must happen before the cell can go through mitosis? Interphase.

Belle's grandfather lives in a region where the temperature drops below 0*F at night. When belle visited her grandfather, they hiked up a hill. Belle noticed that a lot of rock had cracks in them.

The genetic condition of an organism that has two identical alleles for a given trait.

Which level of biological classification is the lowest level that butterflies

What might happen if a continent stops rifting apart?