A model representing many interconnected food chains in which energy flows through a group of organisms.
What is a food web?
100
Subunits of proteins
What are amino acids?
100
The stage during which the cell grows, carries out cell functions, and replicates DNA
What is interphase?
100
Scientific inquiry begins with this direct method of gathering information in an orderly way.
What is observation?
100
Substances move from an area of higher concentration to an area of lower concentration.
What is diffusion.
200
A group of interacting populations in an area
What is a community?
200
Molecules made mostly of carbon and hydrogen that make up fats, oils and waxes.
What is a lipid?
200
Division of a cell's cytoplasm
What is cytokinesis?
200
Investigating a phenomenon in a controlled setting to test a hypothesis.
What is an experiment?
200
The diffusion of water across a selectively permeable membrane
What is osmosis?
300
Any biotic or abiotic factor that restricts the number or distribution of organisms.
What is limiting factor?
300
Compounds composed of carbon, hydrogen, and oxygen in a ratio of one oxygen and two hydrogen for every carbon. These compounds are a primary energy source.
What is a carbohydrate?
300
The process of nuclear division and cytokinesis that results in two daughter cells identical to the parent cell.
What is mitosis?
300
In an experiment this group is used for comparison.
What is a control group?
300
The movement of substances across a plasma membrane against a concentration gradient requiring energy.
What is active transport?
400
Change in an ecosystem that occurs when one community replaces another when no soil is present.
What is primary succession?
400
A biological catalyst that speeds of the rate of chemical reactions.
What is an enzyme?
400
This occurs during prophase I and results in increased variation in DNA.
What is crossing over?
400
This is the tested factor and might affect the outcome of the experiment.
What is independent variable (or manipulated variable)?
400
In this type of solution a cell will shrivel because water moves out of the cell.
What is a hypertonic solution?
500
The cycling of nutrients in the biosphere involving matter, living organisms and physical processes such as weathering.
What is biogeochemical cycle?
500
minimum amount of energy needed for reactants to form products in a chemical reaction.
What is activation energy?
500
Programmed cell death. One place where this occurs is in development of fingers in a fetus.
What is apoptosis?
500
Data collected as numbers
What is quantitative data?
500
the process by which a cell surrounds a substance in the outside environment enclosing the substance in a portion of the cell membrane.