A scientist who wants to study the effects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B ge
ts 5 milligrams of fertilizer each day, and Plant C gets 10 milligrams of fertilizer each day. Which plant is the control group? Select one:
a. Plant C
b. There is no control group in this experiment.
c. Plant A
d. Plant B
This disease is more common in African Americans and
females. Contractures of the fingers are classic for systemic lupus
erythematosus. The butterfly rash on the face is common, occurring in up to 40%
of affected individuals. Joint involvement is common. Pain is generally more
profound in the morning.
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.