Which of the following statements is true? 1. nitrogen is important for plant life, but not for animal life. 2 .oxygen is the most abundant gas in the atmosphere. 3. iron is an important element in chlorophyll. 4. carbon readily forms bonds because it only has four electrons in its outermost shell.

There are six elements that make up most of the human body. which of the following is not one of these six elements?

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.

Buuy which of the following did you include in your response? organs perform specific functions in the body to keep it alive. organelles perform specific functions in cells to keep them alive. done