unit 1
what is theory?
an idea or guess that still hasn’t been proven.
what is a cell?
the basic structural unit of all living organisms.
pedigree
a diagram that illustrates the inheritance of a trait through several generations in a family.
How are the ages of extinct organisms determined?
by studying the concentration of radioactive atoms in their fossils.
homeostasis
a balanced and stable environment within cells and organisms.
What evidence shows that plate tectonics is a scientific theory?
The theory of plate tectonics was developed by many scientists over time. The theory of plate tectonics changed when new information was discovered.
what is a chromosome?
a structure found in cells that contains DNA.
Punnett square
a diagram used to show possible genotypes that can result from a cross.
What data can most likely be collected from fossils?
what an animal ate.
Which treatment would be considered gene therapy?
introducing a new gene to the body.
What is a model?
a simplified, constructed version of a complex object or idea.
Which part of a cell provides instructions for the processes within the cell?
DNA
Which molecule is a pigment?
chlorophyll.
radiation
a release of energy or particles that move at very high speeds
Which type of genetic screening is mandatory in the United States?
newborn screening