Science Practice Questions

A biology class wants to perform an experiment to investigate the effect of different colors of light on seed germination. They wrap transparent glass jars with green, yellow, red, and colorless cellophane, and place three seeds on a damp paper towel in each jar. What role do the different colors of cellophane play in this experiment?

Which of the following describes a genetic mutation that results in uncontrolled division of a single cell within the body?

Which of the following components of a nucleotide determines whether the nucleotide is considered a pyrimidine or a purine?

Which of the following glands secretes follicle-stimulating hormone (FSH)?

When a cut in the skin allows bacteria to enter the body, which body system is primarily responsible for preventing infection?

Which of the following explains why ice floats on top of a pond rather than sinking to the bottom?

In Mendelian inheritance, the dominant allele (T) codes for tall plants and the recessive allele (t) codes for short plants. Which of the following statements is true?

Which of the following is a compound containing a nitrogen atom with a lone pair of electrons that is bonded to one or more hydrocarbon groups?

An atom of oxygen has 6 protons, 8 neutrons, and 6 electrons. Wait actually, oxygen has 8 protons, 8 neutrons, and 8 electrons in its most common isotope. Given this base atom, what combination of subatomic particles could be found in a different isotope of oxygen?