unit 1
Which practices add to scientific knowledge?
inferring, predicting, drawing conclusions
Which scientist discovered that new cells only come from existing cells?
Louis Pasteur
Define alleles.
One of the two copies of genetic code that form a gene.
How are the ages of extinct organisms determined?
by studying the concentration of radioactive atoms in their fossils
Which behaviors are learned?
a group of lionesses hunting prey and a chimpanzee using a tool to eat ants
What is the definition of empirical evidence?
Which statement correctly defines empirical evidence?
The sense of touch is caused by receptors in the skin that respond to what sort of input?
Heat and Pressure
Which observation led Mendel to the idea that traits were controlled by more than a single factor?
A trait that was not seen in the first generation may later reappear in the second generation.
Define adaptation.
an inherited characteristic that increases an individual’s ability to survive in its environment
Physical traits that increase an organism’s fitness are called...
physical adaptations
What is a model?
A simplified, constructed version of a complex object or idea
What are two inputs of photosynthesis?
Carbon dioxide and Water
Which molecule is a pigment?
chlorophyll
Which traits can be seen in plant fossils?
the shape and arrangement of body cells and
the shape of leaves
What happens when a plant cannot maintain homeostasis?
The plant's cells will decrease function, and it will eventually die.