BIOL 1107 Exam Review

Statistics

100

Term for probability that averages differ due to random variation

p-value

200

Acceptable chance of incorrectly concluding that averages of groups are different due to the effect of a variable

alpha value

or 0.05

300

An average of 78lbs for one group and 96lbs for another group, with a p-value of 0.04.

A significant difference

400

Percent of variation in dependent variable that can be explained by variation in the independent variable.

R²

500

Statistical test used to examine the relationship between two quantitative variables.

Regression

Experimental Terms

100

Factor you are measuring/recording to see if it is affected

Dependent variable

200

Collection of study subjects that receive a treatment or manipulation of some kind

Experimental group

300

Factors that are kept the same for ALL study subjects in the experiment

Controlled variables

400

Type of experiment in which data is gathered without manipulating or changing the groups in any way

Observational experiment

500

The group of study participants who don't receive a treatment in an experiment where participants are assigned to either receive treatment or not.

control group

Algal Blooms

100

One of the primary causes of algal blooms; comes from fertilizer runoff and sewage spills

Nitrates

200

An abundance of algae that are producing toxic chemicals and releasing them into the water

Harmful algal bloom

300

Often becomes reduced in bodies of water after eutrophication, causing stress to animals

Dissolved oxygen

400

Organisms that consume dead material in bodies of water

Bacteria

or Decomposers

500

An excess of nutrients in a body of water

Eutrophication

Water Quality

100

Type of source of pollution that doesn't have a single point of origin and is carried to the water by runoff

Nonpoint source

200

Precipitation or irrigation that often carries pollutants and soil to bodies of water

Runoff

300

The area of land that drains into a particular body of water when it rains

Watershed

400

Paved surfaces like sidewalks that do not allow water to soak into the ground

Impervious cover

500

Vegetation along the banks of a river or lake, responsible for protecting the water from some of the pollution in runoff

Riparian zone

Chlorophyll a

100

Primary pigment responsible for making algae and land plants appear green

Chlorophyll a

200

Process that uses chlorophyll a

Photosynthesis

300

Term for tree branches and leaves growing over the middle of a stream

Canopy cover

400

Event that is indicated to have occurred when chlorophyll a concentration is high

Algal bloom

or eutrophication

or nutrient pollution

500

Algae that floats or drifts through the water

Phytoplankton