Which of the following is a true statement about freezing? a. the substance's energy level decreases. b. the substance's energy level increases. c. there is no change in the energy level during freezing. d. the energy level is so great that the substance disappears.

The model illustrates a process by which a substance is taken up by a cell

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Long term exposure to waves can cause sunburns and skin cancer.