Which event occurs during interphase?
a. The cell carries out metabolic processes.
b. Centrioles appear.
c. Spindle fibers begin to form.
d. Centromeres divide.

Which of the following statements is false?
a. Some genes code for enzymes.
b. The instructions for making some proteins are specified by genes.
c. An organism’s proteins determine its genes.
d. An organism’s genes determine its inherited traits.

What is the term for the land, water, and air on Earth and all their organisms?
a. population
b. ecosystem
c. community
d. biosphere

When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
a. one allele from each parent.
b. two alleles from each parent.
c. three alleles from each parent.
d. four alleles from each parent.

The principles of probability can be used to
a. predict the traits of the offspring produced by genetic crosses.
b. determine the actual outcomes of genetic crosses.
c. predict the traits of the parents used in genetic crosses.
d. decide which organism

Which of the following is a correct statement about the events of the cell cycle?
a. Little happens during the G1 and G2 phases.
b. DNA replicates during cytokinesis.
c. The M phase is usually the longest phase.
d. Interphase consists of the G1, S, and

Which of the following is a nucleotide found in DNA?
a. ribose + phosphate group + thymine
b. ribose + phosphate group + uracil
c. deoxyribose + phosphate group + uracil
d. deoxyribose + phosphate group + cytosine

The unequal heating of Earth’s surface
a. drives ocean currents.
b. causes winds.
c. affects Earth’s climate regions.
d. all of the above

In the P generation, a true-breeding tall plant (dominant) is crossed with a true-breeding short plant (recessive). The probability that an F2 plant will be tall is
a. 50%.
b. 75%.
c. 25%.
d. 100%.

What is a malignant tumor?
a. an accumulation of centrioles
b. a mass of cancer cells
c. the rapidly dividing cells found at the site of a wound
d. an abnormal mass of essentially normal cells

Unlike mitosis, meiosis results in the formation of
a. diploid cells.
b. haploid cells.
c. 2n daughter cells.
d. body cells.

How many codons are needed to specify three amino acids?
a. 3
b. 6
c. 9
d. 12

A biome is identified by its
a. average precipitation and temperature.
b. characteristic community of organisms, particularly plants.
c. distance from the equator.
d. specific geographical location.

What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
a. principle of dominance
b. principle of independent assortment
c. principle of probabilities
d. principle of segregat

What is produced during transcription?
a. RNA molecules
b. DNA molecules
c. RNA polymerase
d. proteins

One difference between cytokinesis in plant cells and in animal cells is that plant cells have
a. centrioles.
b. centromeres.
c. a cell plate.
d. chromatin.

What is produced during transcription?
a. RNA molecules
b. DNA molecules
c. RNA polymerase
d. proteins

At different latitudes the sun’s energy strikes Earth
a. at the same angle.
b. at different angles.
c. only during part of the year.
d. only at night.

Which of the following assort independently?
a. chromosomes
b. two genes on the same chromosome
c. multiple alleles
d. codominant alleles

The cell cycle is the
a. series of events that cells go through from “birth” to reproduction.
b. period of time between the birth and the death of a cell.
c. time from prophase until cytokinesis.
d. time it takes for one cell to undergo mitosis.

Unlike mitosis, meiosis usually results in the formation of
a. two genetically identical cells.
b. four genetically different cells.
c. four genetically identical cells.
d. two genetically different cells.

What would Hershey and Chase have concluded if both radioactive phosphorus and radioactive sulfur were found in the bacteria in their experiment?
a. The virus’s protein coat was not injected into the bacteria.
b. The virus’s DNA was not injected into the

The tendency for warm air to rise and cool air to sink results in
a. global wind patterns.
b. ocean upwelling.
c. unequal heat distribution.
d. warm year-round temperatures near the equator.

A Punnett square shows all of the following EXCEPT
a. all possible results of a genetic cross.
b. the possible genotypes of the offspring.
c. the alleles in the gametes of each parent.
d. the actual results of a genetic cross.

Which type of RNA functions as a “blueprint” for protein synthesis?
a. rRNA
b. tRNA
c. mRNA
d. RNA polymerase