An ecosystem's living factors
An ecosystem's nonliving factors
The collection of biotic and abiotic factors of the area where an organism lives
The physical, chemical and biological factors a species needs in order to reproduce
A group of the same species living in one area
A group of different species living in one area
Encompasses all of the biotic and abiotic factors of a given area
A major regional or global community of organisms
Organisms that create their own food
Organisms that get their energy by eating living or once-living organisms
Organisms that only eat plants
Organisms that eat only animals
Organisms that eat both plants and animals
Detritivores that break down organic matter into simpler compounds, returning vital nutrients into the environment
A sequence that links species by their feeding relationship
Shows the flow of energy within an ecosystem
Levels of nourishment in a food chain
A diagram that compares the energy used by producers, primary consumers, and other trophic levels
A close ecological relationship between two or more species
An interspecies interaction in which both organisms benefit from one another
A relationship between two organisms in which one receives an ecological benefit and the other is not harmed
A relationship between two animals in which one organism while the other is harmed
Carbon moves into the biomass through photosynthesis and out through respiration and combustion
Pollutants move higher up the food chain as predators eat prey, accumulating in higher concentration in the bodies of predators
Changes in water temperature affect the amount of oxygen it can supply
Individuals with beneficial adaptations produce more offspring than those lacking them
Requirements for natural selection
Variation, heritability, differential mortality
A feature that allows an organism to better survive in its environment.
Survival of the fittest
Organisms who are better able to survive in their environment will generate more offspring relative to other members of the population
Favors phenotypes at one extreme of a trait's range
Favors phenotypes at the intermediate point of a trait's range
Favors phenotypes at both extremes of a trait's range
Closely related species evolve in different directions
Different species evolve toward similar characteristics
Features similar in structure that appear in different organisms and have different functions
Structures that perform similar functions-like flight- but are not similar in origin
Structures that had a function in an early ancestor
Animal that walks on two legs
A fossil near the branching point in which two species diverge in evolution
Law of Superposition
Youngest fossils rock on top, older fossils on the bottom.
A technique that uses the natural decay rate of unstable isotopes to calculate the age of a material
The amount of time it takes for half the isotope in a sample to decay into a different element
Developing embryos show features indicating their evolutionary origins
A bond formed by two oppositely charged ions
A bond created when two or more atoms share a pair of electrons
Polar covalent bond
Covalent bonds that share electrons unequally
Non-polar covalent bond
Covalent bonds that share electrons equally
An attraction between between a slightly positive hydrogen atom and a slightly negative atom (Oxygen or nitrogen)
The amount of heat required to increase a substance's temperature by one degree
Attraction among molecules of the same substance
Attraction between molecules of different substances
Because the moH+lecules that form a hydrogen bond are predominantly positive and predominantly negative respectively, they can dissolve any polar and ionic bonds
Can bond with water
Cannot bond with water
Compound that increases the levels of H+ concentration in a solution. pH <7
Compound that removes H+ ions from a solution.
ph < 7
Macromolecules that can be broken down to create a usable source of energy for cells.
Two simple sugars bonded together
Polymers of monosaccharides.
Made and stored by plants, can be used as a source of energy.
Made and stored by animals, can be used as a source of energy.
Major building block in plant cell structure
Non polar molecules utilized as a source of energy and in some occasions as part of a cell's structure
Store large amounts of energy in animals
Store large amounts of energy in plants
Saturated Fatty Acids
Contain fatty acids in which all carbon-carbon bonds are single bonds
Unsaturated Fatty Acids
Contain fatty acids with at least one carbon-carbon double bond
Polymers made of monomers called amino acids. Most varied carbon-based molecules in organisms
Building blocks of proteins, made up of carbon, hydrogen, nitrogen, and sometimes sulfur. 20 different variations are used in the construction of proteins
Catalysts for chemical reactions in living things
A region within the enzyme that binds to a protein or other molecule during a reaction
Polymers made up of monomers called nucleotides. Two main types are DNA and RNA
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