Sky is blue everywhere, without clouds of course
Answer: system development life cycle
Explanation: system development life cycle is a term used in systems engineering, information systems and software engineering to describe a process for planning, creating, testing, and deploying an information system.
Water (H2O) takes up more than 60% of the body thus the answer is C
The answer to this question is histidine. Histidine i<span>s an </span>α-amino acid<span> involved in the biosynthesis of </span>proteins. The structure of histidine includes<span> an </span>α-amino acid<span>, a </span>carboxylic acid group<span>, and an </span>imidazole<span> side chain. Histidine was initially thought to be </span>essential<span> only for infants; however, it has since been found to be essential for adults too.</span>
I think that they are both correct: homeostatis maintains the same internal conditions regardless of the outside environment or activity: these conditions include temperature, as Jenna says, and oxygen level, which is what Allen means.
