Information gained by observation is
A. always accurate.
B. empirical evidence.
C. called a variable.
D. the control.
B. empirical evidence.
You might also like to view...
After plant mitosis, the vesicles fuse into a disk-shaped __________. Fill in the blank(s) with the appropriate word(s)
In indirect fluorescent testing, fluorescent _____ are used to react with the Fc region of another, specific, serum antibody.
Fill in the blank(s) with the appropriate word(s).
Which human extraembryonic membrane forms the blood vessels of the umbilical cord?
A. Amnion B. Yolk sac C. Chorion D. Allantois E. Protein coat
Which of the following represents a potential threat to biodiversity?
(a). People construct artificial reefs to support marine life. (b). Humans clear land for agriculture and housing. (c). Energy flows through an ecosystem, with much lost as heat. (d). Tropical rain forests and coral reefs are found where solar energy is the most abundant. (e). In a food chain, one population feeds on another.