In economic systems, which kind of decisions must be made about productive resources? O protection O sustainability O allocation O growth

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

synapse nervous system

segmented body, an exoskeleton made from chitin, and joint appendages.