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cellular organization (least complex to most complex) cells-tissues-organs-organ system-organism plant cell organells cell membrane, cell wall, nucleus, cytoplasm, mitochondrian, chromosomes, vacuole, chloroplast animal cell organells cell membrane, nucleus, mitochondrian, cytoplasm, chromosomes, vacule photosythisis converts radiant energy (sunlight) into chemical enerygy (suger/glucose). occers in the chloroplast of the plant cell. the cell theory cells are the basic unit of all living things. all cells come from other cells all organisms are made of cells xylem and phloem (plant structure) is part of the plant tissue that allows water and nutriunts and waste to go in and out of the plant cell geotropism an organisms response to gravity. ex: when aplaant is tripped over, the roots grow down while the stems grow upward to the sun asexual reproduction creats geneticlly identical offspring. produces the least amount of genetic variation. involves only one parent. can adapt to environment very easily. Ex: bacteria,hydra sexual reproduction involves two parents. creates genetic diverse offspring. produces the most amount of genetic information. Ex: people and all mammals homeostais The abillity to maintain a stable internal state while living in an environment with constant changes. external stimulus nything outside of the organisms body that can trigger an organism to respond internal response a reaction an organism has to a stimulus to help the organism maintain phototropism an organisms responce to light turgor pressure is the main pressure on a cell wall determind by the amount of water content in the vacuole. turgor pressure allows a plant to stay upright so a plant that is willted has very little turgor pressure.