Biology 101 exam 1 Questions And Answers Solved 100% Correct!!

Biology - The scientific study of life Ecosystem - All the organisms living in a particular area Community - Entire array of organisms in a ecosystem Population - All individuals of a particular species living in an area Organism - individual living thing Organ system - several organs that cooperate in a specific function Organ - Made up of several different tissues made up of a group of similar cells that perform a specific function Cell - Fundamental unit of life Organelle - Membrane enclosed structure that performs a specific function within the cell Molecule - Cluster of small chemical units called atoms held together by chemical bonds Prokaryotic Cells - Small Simple unicellular No organelle system No nucleuscell walls made of sugar Eukaryotic Cells - Large complex unicellular & multicellular have nucleus may have cell walls Producers - Organisms in eco- system that can make their own food Consumers - Eat plants and other animals Decomposers - Take matter and breaks down protein and distributes it back into Earth Four most common elements in living organisms - Oxygen(O) Hydrogen(H) Nitrogen(N) Carbon(C) Atoms - Smallest units of matter Matter - Anything that occupies space and has mass Element - A substance that cannot be broken down to other substances by ordinary chemical means Compound - Substance consisting of two or more different elements combined in a fixed ratioPercentage of elements used by organisms - 96.3%