All organisms must breathe. that is, they must take in one type of gas that they need for life functions, and then they must get rid of waste gases. most animals take in oxygen and expel carbon dioxide, while most plants take in carbon dioxide and expel oxygen. what part of all organisms is involved in the exchanging of gases?

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?