Multiple choice

1.Which of the following describes a state of equilibrium?

a. When the concentration of water outside a cell is the same as the concentration of water inside of a cell

b. When a cell with a lot of water in it continues to absorb water

c. When water molecules have stopped moving or vibrating

d. When the roots of a tree absorbs nutrients from the soil

2.Which of the following is a testable hypothesis?

a. Lilies are more beautiful than tulips

b. A tree needs at least 4 hours of sunlight a day to survive

c. The Mythbusters are the greatest scientists on earth

d. Humans will land on Mars someday

3.Which statement best describes a difference between prokaryotic cells and eukaryotic cells:

a. The presence of both DNA and ribosomes in prokaryotic cells indicates that they are more complex than eukaryotic cells.

b. The presence of membrane-bound organelles in eukaryotic cells indicates that they are more complex than prokaryotic cells.

c. The larger size of eukaryotic cells indicates that they are more complex than prokaryotic cells.

d. The larger size of prokaryotic cells indicates that they are more complex than eukaryotic cells.

4.What’s the difference between a hypothesis and a theory?

Select one:

a. “Theory” is another word for “fact;” “hypothesis” is another word for “guess”

b. Hypotheses can’t be proven, theories can

c. Theories have been confirmed through tests; hypotheses have not

d. Theories contain many hypotheses; a hypothesis only contains one theory