Terms in this set (68)
the natural home or environment of an animal, plant, or other organism.
All the different populations that live together in an area
A group of individuals that belong to the same species and live in the same area
A group of ecosystems that share similar climates and typical organisms
An educated guess
a procedure that is used to test a hypothesis
The thing that stays the same in an experiment
System that includes all abiotic and biotic factors
Largest number of individuals of a population that a environment can support
A measurement of the number of people per given unit of land
zero population growth
when the birth rate equals the death rate
First species to populate an area during primary succession
the final stage of succession stable functioning community
warming that results when solar radiation is trapped by CO2 in the atmosphere
An organism that can make its own food.
An organism that obtains energy by feeding on other organisms
process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
The process of gathering evidence to test and refine scientific theories.
the number of births in a population in a certain amount of time
The number of deaths in a population in a certain amount of time
Non living factors
Basic unit of matter. Smallest particle of an element
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
A subatomic particle that has no charge and that is found in the nucleus of an atom
A subatomic particle that has a negative charge found outside of nucleus
A chemical bond that involves sharing a pair of electrons between atoms in a molecule
Formed when one or more electrons are transferred from one atom to another
Attraction between a slightly positive hydrogen atom and a slightly negative atom.
scale that is used to measure acidity
describes a solution with a high concentration of H+ ions
describes a solution in which there are more OH-
A homogeneous mixture of two or more substances
A property of a plasma membrane that allows some substances to cross more easily than others.
Has 3 parts
Cells smallest unit of life
All living things have cells
Cells come from pre-existing cells
fluid mosaic model
A model that refers to how the lipid bilayer tends to act more like a liquid than a solid. And as a pattern
A tendency to maintain a balanced or constant internal and external state
Consists of to no polar tails and a polar head
membrane proteins that help move substances across a cell membrane
The hairlike projections on the outside of cells that move in a wavelike manner (how cells move around)
whiplike tails found in one-celled organisms to aid in movement (Prokaryotic and bacteria)
flexible, selectively permeable boundary that helps control what enters and leaves the cell
When something can let something's in and somethings out
Diffusion of water through a selectively permeable membrane
the movement of materials through a cell membrane using energy (low to high)
the movement of substances across a cell membrane without the use of energy by the cell (high to low)
when comparing two solutions, the solution with less water concentration
Having a higher concentration of water than another solution
When the concentration of two solutions is the same
process by which a cell takes material into the cell by infolding of the cell membrane
Process by which a cell releases large amounts of material
threadlike structures made of DNA molecules that contain the genes
draws the chromosomes to opposite poles of the cell.
Region of a chromosome where the two sister chromatids attach
surface area to volume ratio
this formula determines if a cell is of a size that can sustain division.
ATP (adenosine triphosphate)
Main energy source that cells use for most of their work. And to store and release energy
the breakdown of glucose by enzymes, releasing energy and pyruvic acid.
KCAC(krebs citric acid cycle)
Cleaning stage (turns twice because of two pyruvic acids
electron transport chain
Energy stage Breaks the fall of electrons to oxygen in several energy-releasing steps.
The process by which cells break down glucose to release the energy they contain.
The process by which a cell captures energy in sunlight and uses it to make food (chemical energy)
light dependent reactions
set of reactions in photosynthesis that use energy from light to produce ATP and NADPH
light independent reactions
use energy from the light dependent reactions to make glucose
a biochemical pathway of photosynthesis in which carbon dioxide is converted into glucose using ATP
density dependent ex: an animal
Vary based on the population density usually biotic
density independent ex: climate
Referring to any characteristic that is not affected by population density. Usually abiotic
Compounds with the same formula but different structures.
Atoms of the same element that have different numbers of neutrons.