2 points
The EPA sets national air quality standards for common air pollutants. The
graph shows the change in the concentrations of these pollutants over time.
Which pollutant have the air quality standards had the greatest impact on?
Monitored concentrations
of pollutants
PM
Normaland Concert
1995
199 200 2005 2010
Year
O A. Ozone
B. NO
OC. PMO
O D. Lead

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)