What human activity would have the most significant effect on the temperature of the earth? a) deforestation b) producing smog c) producing cfcs d) burning fossil fuels

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.