Which compound is a hydrocarbon?

a. H20
b. CO2
c. C2H6
d. C6H12O6

What is the primary goal of human communities?

Which of the following is not a type of epithelial cell

The source of energy shown in the image is (renewable, non renewable, polluting) a drawback of building a dam is that (it will destroy ecosystems, it requires fossil fuels, it won’t be useful for irrigation)