Unit 1
What is a qualitative observation?
Information that describes a quality of what is being observed
What are eukaryotic cells?
Cells that have a nucleus and other membrane-bound organelles
What are the only 2 alleles?
Dominant and recessive
How are the ages of extinct organisms determined?
By studying the concentration of radioactive atoms in their fossils
What is innate behavior?
An activity or behavior that occurs naturally in an organism
What is the purpose of a microscope?
To view very small objects
What are white blood cells specialized for?
To fight infections
What are Punnett Squares?
A diagram used to show possible genotypes that can result from a cross
Which statement about organisms in the fossil record is correct?
Life originated in the oceans.
What is learned behavior?
An activity or behavior that is acquired by an organism through experience
What is an inference?
An explanation for an observation
What is the shape of DNA?
A double helix
How many pairs of chromosomes do people have?
23
Where does natural selection occur?
In areas that are close to human settlements and in natural areas, unaffected by human actions
What are the two components of the mechanism that maintains homeostasis in an organism?
Detection and response