1.which of the following appeared on earth most recently?
a. chordates
b. tetrapods
c. dinosaurs
d. single-gene algae
2.dinosaurs appeared before
a. mammals
b. photosynthesis
c. chordates
d. land plants

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects