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Characteristics of life
- use/need energy
- grow/develop
- are composed of cells
- have the ability to reproduce
- maintain stable internal conditions
- are organized
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The study of life
Biology
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scientific method (in order)
- observations
- hypothesis
- predictions
- experiment
- conclusion
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that group that lacks the independent variable
control group
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data with numbers
Quantitative
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data with words
qualitative
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the changes that have occurred over many generations to create the world as we know it today
evolution
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Biome: coldest, treeless, permafrost
tundra
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Biome: cold, cone bearing trees called coniferous
Taiga
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Biome: Trees lose leaves in the fall, four seasons
Temperate Deciduous Forest
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Biome: mild, no tress (rain), grasses
Temperate Grasslands
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Biome: Warm, trees
Savannas
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Biome: most productive, evergreens, moist
Tropical Rainforest
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Biome: hot, cold, succulent
Desert
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Biome: bog, marsh, swamp
Wetlands
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ocean zone with sunlight, and photosynthesis
sunlit zone (photic zone)
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ocean zone without sunlight
aphotic zone
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all of the living and nonliving things in an area
ecosystem
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all of the life in an area
community
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group of individuals of the same species
population
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a group of organisms of a single type that are capable of producing fertile offspring in the natural environment
species
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relationship in which one species benefits and the other is not harmed or benefited
Commensalism
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interaction in which both species benefit; both species get something out of the relationship
Mutualism
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a relationship in which one organism is harmed while the other benefits
Parasitism
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close interactions between organisms
symbiosis
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consists of a predator and prey
predation
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how are photosynthesis and respiration related?
- they have the same formula just flipped:
- 6CO²+6H²O+energy(sun)--> C6H12O6+6O2 (sugars) or
- " <-- "
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cycle: precipitation, evaporation, transpiration, condensation, groundwater
water cylce
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cycle: cellular respiration, photosynthesis, decomposition, carbon dioxide
carbon cycle
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what eat and absorb "waste" materials
decomposers
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growth of a community from scratch
primary succession
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growth of a community from leftovers
secondary succession
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the first species to colonize a new habitat
pioneer species
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the number of individuals a population contains
population size
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how crowded a population is
population density
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the spatial distribution of individuals within the population
population dispersion
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survivorship curve: the likelihood of dying is small until late in life, when mortality
type 1
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survivorship curve: the probability of dying does not change throughout life
type 2
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survivorship curve: many organisms are very likely to die when young, has a good chance of surviving to old age
type 3
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the distribution of individuals among different ages in a population
age structure
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organisms that obtain their energy by taking in, consuming food from an outside source
consumers/ heterotrophs
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organisms that obtain their energy by producing their own food
producers/ autotrophs
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organisms who eat ptoducers
herbivores
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organisms that eat consumers
carnivores
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factors in an ecosystem that are not living
abiotic factors
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factors in an ecosystem that are living
biotic factors
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the physical area in which an organism lives
habitat
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the range of resources and conditions a species actually uses or can tolerate at optimal efficiency, smaller than a fundamental niche
realized niche
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the full range of conditions that a species
can tolerate and resources it can use
fundamental niche
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limit growth of a population
limiting factors
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pure substances that cannot be broken down chemically into simpler kinds of matter
elements
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the simplest particle of an element
atom
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pure substance that is made up of atoms of two or more elements
compound
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a chemical structure composed of one or more atoms
molecule
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periodic table designed and arranged by...
Demetri Mendeleev
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a bond formed by electrical attraction between two oppositely charged ions
ionic bond
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a bond that forms when two atoms share one or more pairs of electrons
covalent bonds
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a weak chemical bond between the hydrogen atom in one molecule and a negatively charged region of another molecule
hydrogen bond
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which monomers make up carbohydrates
monosaccharides
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which monomers make up lipids
glycerol and fatty acids
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which monomers make proteins
amino acids
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which monomers make up nucleic acids
nucleotides
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scale of bases and acids
ph scale
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bitter and slippery
bases
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a catalyst, usually a protein, in living systems
enzyme
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a chemical that reduces the amount of activation energy needed for a reaction but is not a reactant
catalyst
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the cell theory:
- all living things are composed of one or more cells
- the cell is the basic unit of structure and function in living things
- all cells must come from preexisting cells
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prokaryotes or eukaryotes: do not have a nucleus
prokaryotes
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cell part: "gate keeper", selectively permeable, made of proteins and lipids
cell membrane
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cell part: controls the cell, contains info, has chromatin/chromosomes
nucleus
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cell part: site of protein synthesis
ribosomes
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cell part: rough, the molecule highway; smooth, site of lipid sunthesis
endoplasmic reticulum
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cell part: processes, packages, and secretes
golgi apparatus/ golgi bodies
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cell part: powerhouse of the cell
mitochondria
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cell part: support for the cell and organelles
cytoskeleton
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cell part: break down and remove foreign material or digest food particles
lysosomes
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cell part: build the spindle for cell division
centrioles
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in diffusion moving down the concentration gradient happens, what is the result?
equilibrium
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process of a cell engulfing large amounts of material
endocytosis
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expelling large amounts of materials
exocytosis
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movement of molecules from an area of high concentration to an area of low concentration
diffusion
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diffusion of water
osmosis
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when there is a higher concentration inside and lower concentration outside, cell drains
hypertonic solution
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opposite of hypertonic, cell fills and could burst (swells)
hypotonic solution
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water moves evenly and continuous
isotonic solution
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movement of molecules in/out of cell without energy
passive transport
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movement of molecules with the use of energy
active transport
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use carrier proteins
facilitated diffusion
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the conversion of light energy into chemical energy stored in organic compound
photosynthesis
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the process in which cells make ATP by breaking down organic compounds
cellular respiration
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uses thylakoids, known as light reaction
light - dependent reactions
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uses stroma, known as dark reactions
light-independent reactions
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a process in chloroplasts and mitochondria in which the movement of protons down their concentration gradient across a membrane is coupled to the synthesis of ATP
chemiosmosis
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the process by which pyruvic acid is converted to lactic acid
lactic acid fermentation
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the process by which pyruvic acid is converted to ethyl alcohol; the anaerobic action of yeast on sugars
alcoholic fermentation
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respiration with oxygen
aerobic
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respiration without oxygen
anaerobic
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what is the final electron acceptor in respiration?
oxygen
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the production of offspring that does not involve the union of gametes
asexual reproduction
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thew production of offspring from the combination of genetic material from two parent organisms
sexual reproduction
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a chromosome that determines sex
sex chromosome
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a chromosome that is not a sex chromosome
autosome
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an asexual cell division of prokaryotes that produces identical offspring
binary fission
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mitosis: chromatin is coiled to form chromosomes, centrosomes appear, spindle is forming, nuclear envelope and nucleus disaapear, longest phase of mitosis
prophase
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mitosis: centrosomes are at poles, spindle formed, spindle fibers are attched to chromosomes, chromosomes lined up equator
metaphase
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mitosis: sister chromatids are pulled to opposite sides of cell, centrosomes split
anaphase
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mitosis: nuclear envelope and nucleus appear, chromatids uncoil to form chromatin, spindle breaks apart, centrosomes/ centrioles, disappearring, cytokinesis
telophase
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mitosis: final pinching of the cytoplasm to form two cells
cytokinesis
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animal or plant cells: cleavage furrow
animal cells
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animal or plant cell: cell plate
plant cell
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preparation for and lead up to cell division, cell divides
cell cycle
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meiosis: centrosomes appear, spindle forming, chromatin coils to form chromosomes, nuclear membrane and nucleolus disappear, synapsis of homologous chromosomes, crossing over may occur
prophase 1
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meiosis: random alignment of tetrads on equator, spindle fiber attaches to chromosomes
metaphase 1
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meiosis: each whole chromosome is pulled to a pole, tetrads split
anaphase 1
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meiosis: nucleus/ nucleolus may or may not appear, whole chromosomes at poles, cytokinesis begins, 2 new haploid cells
telophase 1
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meiosis II: same, but without DNA replication
interphase II
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meiosis II: centrosomes appear, spindle forming, nuclear envelope and nucleolus disappear
prophase II
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meiosis II: chromosomes on equator, spindle attaches to chromatids
matephaseII
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meiosis II: chromatids are pulled to the poles
anaphase II
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meiosis II: centrosomes disappear, spindle breaks down, nuclear envelope and nucleolus reappear, cytokinesis II begins
Telophase II
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spermatogenesis occurs in....
the testes
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oogenesis occurs in...
the ovaries
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hereditary information in the form of a large molecule called deoxyribonucleic acid
DNA
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a nucleic acid composed of a single strand and distinguished from DNA by containing ribose and uracil
RNA
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who designed the double helix?
Watson and Crick
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split DNA molecule by breaking H-bonds
helicase
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build new DNA strands by Attaching nucleotides
DNA polymerase
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process of copying the message stored in DNA and RNA
transcription
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building of a protein using info on RNA
translation
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an allele that makes the presence of another
dominant
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an allele that is masked by the presence of another
recessive
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a segment of DNA that codes for the production of a certain protein/trait
gene
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an alternative form of a gene
allele
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both alleles are the same
homozygous
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the alleles of the organism are different
heterozygous
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when any allele of the pair is dominant and the other is recessive
complete dominace
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there is no dominant or recessive allele, when both alleles are together (heterozygous individual) you see an inheritance or blend of traits
incomplete dominance
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when you have 2 different alleles together you see a phenotype that shows both traits at the same time
codominance
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more than two alleles
multiple allele traits
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traits that are controlled by more than one gene
polygenic trait
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traits that are linked to the X or Y (sex) chromosomes
sex-linked traits
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genetic makeup of an organism
genotype
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physical characteristics based on genotype
phenotype
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the field of biology that studies the transmission of traits from parents to offspring
genetics
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the transmission of traits from parents to offspring
heredity
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the six kingdoms
- archaebacteria
- eubacteria
- protista
- fungi
- plantae
- animalia
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biological hierarchy
- kingdom
- phylum
- class
- order
- family
- genus
- species
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a system of naming organisms that uses the genus mane and a species identifier
binomial nomenclature
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how are species name written
the genus first then the species
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the science of grouping organisms according to their presumed evolutionary relationships
taxnomy
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transports water and nutrients from the soil up into the plant
xylon
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transports food (glucose) around the plant
phloem
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the transfer of pollen from an anther to a stigma of a flower of the same species
pollination
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This cavity surrounds the gut, may contain various other organs
coelomate
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without a coelom or body cavity; an animal lacking a body cavity
acoelomate
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Animals that have a body cavity that is in direct contact with the outer muscular layer of the body and does not arise by splitting of the mesoderm
pseudocoelomates
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In animals, refers to organisms with their body parts arranged around a central axis
radially symmetrical
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In animals, refers to those that have a single axis of symmetry
bilateral symmetry
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A hard, jointed, external covering that encloses the muscles and organs of an organism
exoskeleton
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The sessile form of life history in cnidarian
polyp
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The motile bell-shaped form of body plan in cnidarians
medusa
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In chordates, a cellular rod that runs the length of the body and provides dorsal support
notochord
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The segments of the spinal column
vertebrae
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A stiff hair, bristle, or bristlelike process or part on an organism.
setae
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To shed periodically part or all of a coat or an outer covering, such as feathers, cuticle, or skin, which is then replaced by a new growth
molting
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A system of water-filled canals derived from the coelom that connects the tube feet of echinoderms
water vascular system
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in most multicellular organisms, a group of similar cells that carry out a common function
tissue
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several types of body tissues that together perform a function
organ
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a group of organs that interact to perfrom a set of related tasks
organ system
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