When a person is frightened, epinephrine and norepinephrine are released into the bloodstream from the

a. brain

b. adrenal glands

c. pituitary

d. thyroid gland

Which 2 biomes have the least precipitation? Tropical rain forest & temperate grassland. Savanna & tropical rain forest. Tundra & desert. Boreal forest & temperate forest.

The minimum amount of stimulus for an action potential to occur is

Mutations in body cells can result in what?

A biology student looks at an unidentified cell under the microscope. The student identifies a nucleus, several oblong organelles, a cell membrane, and a cell all. Which of the following types of cells could this be?

Is a rock classified as a nonliving and abiotic?

Why does dna need to coppy before the cell divides

As líquid water freezes, the molecules take up more space than aqua water What do you think would happen if frozen water molecules required less space than liquid water molecules?

Which of the following mineral types can you use radiometric dating on? Homogeneous Inorganic Radioactive Ore

Which type of bond holds a water molecule together

Make a claim that answers the scientific question