BIOL 1308 REVIEW QUESTIONS FOR TEST 4

From the list provided, select all that are provided by studying transitional fossils.

• Transitional fossils provide evidence of how a species has changed over time.

• Transitional fossils provide an estimated timeline of changes.

• Transitional fossils help predict how a population will further evolve.

• Transitional fossils help calibrate the fossil record by comparing amounts of radioactive compounds.

From the list provided, select the two circumstances necessary for evolution to occur.

• There must be a variation for a trait within a population.

• An advantageous trait must be passed on to the next generation.

• The environment should remain constant.

• All traits in a population should be the same.

Which of these best describes a virus?

• A noncellular living organism

• The smallest bacteria known

• An invasive cell that cannot stop reproducing

• A nonliving complex of RNA or DNA protected by a protein coat

All viruses are made up of two components. These components are

• a protein capsid and genetic material, in the form of either RNA or DNA.

• RNA and DNA.

• a plasma membrane and DNA within a nucleus.

• fiber proteins that extend from the body of the virus and one or more tails that are used for locomotion.

What is the correct sequence of events in viral reproduction?

• A) Penetration, attachment, integration, biosynthesis, maturation, release

• B) Endocytosis, uncoating, maturation, and release

The cycle of viral infection that will rapidly result in the death of a bacterial cell is called the ______ cycle.

• lysogenic

• apoptosis

• lytic

• retroviral

Which of the following types of cells would a flu virus most likely target as the means of entry into the body?

• Epithelial cells lining the respiratory system

• Epithelial cells on the skin's surface

• Osteoclasts within bone cells

• Red blood cells that are exposed through breaks in the skin

A certain species of butterfly varies in color from white to dark blue. The birds found in the same area feed on the white or lightly colored butterflies, leaving butterflies that are darkly colored. This is an example of what type of selection?

• Stabilizing selection

• Disruptive selection

• Directional selection

• Artificial selection

In the cells of all organisms, the information that specifies traits is stored in the pattern and order of nucleotides in ______ molecules.

• DNA

• glycoprotein

During previous flu seasons, small variations in the influenza virus resulted in the immune system's inability to fully recognize and respond to flu exposure. As a result, vaccine effectiveness could be as low as 30%. This is an example of

• antigenic drift.

• antigenic shift.

• artificial selection.

• the founder effect.