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A community of living organisms and their interactions with the environment
Ecosystem
study of the general principles of scientific classification
taxonomy
the taxonomic kingdom of lower plants
fungi
p(otential of) H(ydrogen); the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral)
pH
depending on or incidental to what is original or primary
secondary
What is the process by which green plants and some other organisms use sunlight to synthesize foods wit the help of chlorophyll?
Photosynthesis
a key for the identification of organisms based on a series of choices between alternative characters
Dichotomous key
eukaryotic one-celled living organisms distinct from multicellular plants and animals; protozoa, slime molds, and eukaryotic algae
Protista
the intermolecular force that holds together the molecules in a solid or liquid
cohesion
the property of sticking together (as of glue and wood) or the joining of surfaces of different composition
adhesion
The ability of an Organism to maintain a stable internal environment despite external changes
Homeostasis
a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma
Prokaryote
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
osmosis
the substance acted upon by an enzyme or ferment
substrate
an organism or cell having only one complete set of chromosomes
haploid
Genetics
an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells
Eukaryote
the dissolved substance in a solution; the component of a solution that changes its state
solute
an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain
carbohydrate
an organism or cell having two sets of chromosomes or twice the haploid number
diploid
The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water
Cellular Respiration
a large group of bacteria having rigid cell walls; motile types have flagella
Eubacteria
a liquid substance capable of dissolving other substances
solvent
organic compounds containing an amino group and a carboxylic acid group; proteins are composed of various proportions of about 20 common amino acids
amino acid
(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism
mutation