Summarize how the actions of the heartbeat make their first and second sounds.

Where is energy trapped inside the organelle chlorophyll

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic.b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.c. all bacterial enzymes are harmful to humans and the environment.d. microbes create pollutants and toxins that harm the environment.

In what for do plants utilize nitrogen? why do they need nitrogen?