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27 Cards in this Set

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  • Back
hypothesis
educated guess
biosphere
part of Earth in which life exists including land, water, and air or atmosphere
community
assemblage of different populations that live together in a defined area
species
group of similar organisms that can breed and produce fertile offspring
ecosystem
collection of all the organisms that live in a particular place, together with their nonliving environment
ionic bond
bond formed when one or more electrons are transferred from one atom to another
population
group of individuals of the same species that live in the same area
covalent bond
bond formed by the sharing of electrons between atoms
reactant
element or compound that enters into a chemical reaction
product
element or compound produced by a chemical reaction
biome
group of ecosystems that have the same climate and dominand communities
autotroph
organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
heterotroph
organism that obtains energy from the food it consumes; also called a consumer
consumer
organism that relies on other organisms for its energy and food supply; also called a heterotroph
herbivore
organism that obtains energy by eating only plants
carnivore
organism that obtains energy by eating animals
decomposer
organism that breaks down and obtains energy from dead organic matter
exponential growth
growth pattern in which the individuals in a population reproduce at a constant rate
density-dependent limiting factor
limiting factor that depends on population size
density-independent limiting factor
limiting factor that affects all populations in similar ways, regardless of population size
biodiversity
biological diversity; the sum total of the variety of organisms in the biosphere
symbiosis
relationship in which two species live closely together
hox genes
series of genes that controls the differentiation of cells and tissues in an embryo
active transport
energy-requiring process that moves material across a cell membrane against a concentration difference
facilitated diffusion
movement of specific molecules across a cell membrane through protein channels
frameshift mutation
mutation that shifts the "reading" frame of the genetic message by inserting or deleting a nucleotide
point mutation
gene mutation involving changes in one or a few nucleotides