What do all conventional energy generation techniques require to work? A. oil as a starting fuel
B. conversion of electrical energy into mechanical energy
C. connection to the nuclear fusion in power plants
D. conversion of mechanical energy into electrical energy

Which best summarizes the finding of avery? a. some traits are recessive. b. humans reproduce sexually. c. dna is a transforming factor. d. traits cannot be inherited.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion