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26.15: O

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obesity
condition in which the body mass index is 30.0 kg/m2 or greater
observation
anything that is detected with the senses
omnivore
consumer that eats both plants and animals
oogenesis
process of producing eggs in the ovary
open circulatory system
type of circulatory system in which blood flows not only through blood vessels but also through a body cavity
operator
a region of an operon where regulatory proteins bind
operon
region of prokaryotic DNA that consists of a promoter, an operator, and one or more genes that encode proteins needed for a specific function
organ
structure composed of more than one type of tissue that performs a particular function
organelle
structure within the cytoplasm of a cell that is enclosed within a membrane and performs a specific job
organic compound
compound found in living things that contains mainly carbon
organism
an individual living thing
organ system
group of organs that work together to do a certain job
osmosis
diffusion of water molecules across a membrane
ossification
process in which mineral deposits replace cartilage and change it into bone
osteoblast
type of bone cell that makes new bone cells and secretes collagen
osteoclast
type of bone cell that dissolves minerals in bone and releases them back into the blood
osteocyte
type of bone cell that regulates mineral homeostasis by directing the uptake of minerals from the blood and the release of minerals back into the blood as needed
ovary
one of two female reproductive organs that produces eggs and secretes estrogen
ovipary
type of reproduction in which an embryo develops within an egg outside the mother’s body
ovovivipary
type of reproduction in which an embryo develops inside an egg within the mother’s body but in which the mother provides no nourishment to the developing embryo in the egg
ovulation
release of a secondary oocyte from the uterus about half way through the menstrual cycle
ozone hole
hole in the ozone layer high in the atmosphere over Antarctica caused by air pollution destroying ozone

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Feb 23, 2012

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Aug 22, 2014
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CK.SCI.ENG.SE.1.Biology.26.15
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