Biology 20 Chapter 3 & 4 Questions And
Answers
Dichotomous Key Identification keys that use a series of paired comparisons to sort
organisms into smaller and smaller groups
Biome Large ecosystems or group of ecosystems in a specific region on Earth that has a
particular combination of abiot...
Dichotomous Key Identification keys that use a series of paired comparisons to sort
organisms into smaller and smaller groups
Biome Large ecosystems or group of ecosystems in a specific region on Earth that has a
particular combination of abiotic ad biotic factors
Habitat Where an organism lives
Niche An organism's role or function in its ecosystem
Limiting Factor Any abiotic or biotic factor that keeps a population from growing too
large
Exotic Species A non-native species that is introduced into an area; doesn't have a natural
predator
, Biology 20 Chapter 3 & 4 Questions And
Answers
Transect A long relatively narrow rectangle area marked out in a study area for the
purpose of sampling a population
Quadrat Using a grid to sample a population and determine its population size
Mitosis Cell decision that results in two identical cells from one parent cell; each new cell
has the same number of chromosome as the parent cell
Meiosis Cell division that results in four daughter cells each with half the number of
chromosomes as the parent cell
Variation Differences (visible or invisible) between members of a population ; can be a
disadvantage, advantage or have no effect
Adaptation A variation that increases an individuals chance for survival
Sexual Reproduction Joining of egg and sperm; shuffling of chromosomes results in
genetic variation
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