Which substance correctly identifies a reactant in the following chemical equation?
CO2 + H2O ? H2CO3
a. water
b. carbon
c. oxygen
d. hydrogen
e. carbonic acid
a
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Mendel’s plant experiments demonstrated that
A. peas were a poor choice for understanding basic hereditary principles. B. DNA was the molecule carrying the genetic code. C. traits are passed on from parent to offspring as discrete units. D. traits inherited from each parent blended together in the offspring.
In roots auxins tend to ________ cell elongation, in stems they promote cell elongation.
A. promote. B. not influence. C. have little effect on. D. not be a factor in. E. inhibit.
The genetic material of all living organisms is
a. protein. b. deoxyribonucleic acid. c. ribonucleic acid. d. glycoprotein. e. polypeptide.
Microscope rulers measure microorganisms in micrometers (?m). How many micrometers fit in a meter?
A. 100 B. 1,000,000 C. 100,000 D. 1,000 E. 10