Approximately how much brighter than the star aldebaran is the star betel-
geuse?
(1) betelgeuse is approximately twice as bright as aldebaran.
(2) betelgeuse is approximately 10 times as bright as aldebaran.
(3) betelgeuse is approximately 100 times as bright as aldebaran.
(4) betelgeuse is approximately 10,000 times as bright as aldebaran.

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?

Can an organism fill more than one trophic level?