True or False
1. Air pollutants can come from both natural and man-made sources.
2. Light pollution is negatively effecting fireflies and their populations are decreasing because of this.
3. Excessive use of car horns and sirens are both examples of noise pollution.
4. Light pollution allows us to see the stars easier.
5. Forest Fires are an example of natural air pollution.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

What are the characteristics of subsystem

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides