Can anyone answer number 1 please

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

What is the importantence of the carbon and nitretan cycles in the environment

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above