GS-Module 8/9

GS-Module 8/9

Question Answer
atom the smallest chemical unit of matter
molecule two or more atoms linked together to make a substance with unique properties
photosynthesis the process by which green plants and some other organisms use the energy of sunlight and simple chemicals to produce their own food
metabolism the sum total of all processes in an organism that convert energy and matter from outside sources and use that energy and matter to sustain the organism's life functions
receptors special structures that allow living organisms to sense the conditions of their internal or external environment
cell the smallest unit of life in creation
criteria for life (main 4) -all life forms contain DNA-all life forms have a method by which they extract energy from the surroundings and convert it to sustain them-all life forms must reproduce-all life forms can sense changes in their surroundings and respond to them
DNA -Deoxyribonucleic acid-composed of a sugar backbone and nucleotides-gives instructions to the cell to carry out life functions-contained in the nucleus of the cell
nucleotide bases -adenine, thymine, cytosine, guanine-adenine is always paired with thymine-cytosine is always paired with guanine-store information in DNA
4 components necessary for photosynthesis water, carbon dioxide, chlorophyll, sunlight
2 outputs (products) of photosynthesis oxygen, glucose (sugar)
all life forms reproduce -reproduction can take place even without offspring because organisms must reproduce their own cells to continue living and functioning as normal-some organisms can reproduce by themselves. Ex. bacteria can divide and become two cells
3 basic types of cells animal, plant, bacteria
index fossils Fossils considered to represent a certain period in earth’s past
geological column A theoretical picture in which layers of rock from around the world are meshed together into a single, unbroken record of earth’s past

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