unit 2 biology Flashcards
biodiversity
all of the variations found among different species and among individuals of the same species
adaptation
a genetic trait that helps an organism survive or reproduce
mutations
errors or mistakes that occur while the dna is replicated
habitat
the place in an ecosystem in which an organism lives
niche
the functional role an organism plays in its ecosystem
resources
all of the items gathered from living organisms and from non-living parts of the environment to fulfill an organism’s wants or needs
competition
the struggle between organisms for a resource in limited supply
tolerance
an organism’s ability to withstand a range of values for a chemical or physical factor in the environment
DNA
an organic compound made of subunits called nucleotides that stores the genetic information to make proteins
RNA
an organic compound made of subunits called nucleotides that stores and transfers the genetic information needed to make proteins
protein
an organic compound made of subunits called amino acids that…
enzyme
a protein that speeds up a chemical reaction
hormone
an organic compound that is made by one part of the body that sends a chemical signal to another part of the same body
pheromone
an organic compound made by an organism to send a chemical signal to another organism of the same species
allelochemical
an organic compound made by one organism that sends a chemical signal to another organism of a different species