Unit 6 Natural Selection and Evolution LL Review

Lice are small wingless insects that make their home in human hair. They can be transferred from person to person and through the use of contaminated items such as brushes or pillows. Which type of disease is lice infestation?

• communicable

• noncommunicable

• genetic

• lifestyle

What would be the best advantage of having a map of all the genes in a human’s body?

• gene therapy to remove bacteria from the soil

• gene therapy to correct defective genes that cause diseases

• more communicable diseases

• fewer communicable diseases

What do viruses have that normal living cells do not have?

• DNA

• ribosomes

• RNA

• protein capsid

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food?

• Viruses can use energy of living cells that they infect.

• Viruses can replicate inside a host that they infect.

• Viruses can cause contagious illnesses in host cells.

• Viruses integrate their RNA or DNA into infected cells.

Which best describes the lysogenic cycle?

• A person who is infected with the herpes virus may develop a cold sore when the virus is in the lysogenic cycle.

• The lysogenic cycle occurs mainly in extremely infectious diseases that rapidly cause infection.

• In the lysogenic cycle, genetic material from the virus and host cells are integrated and are called a provirus.

• In the lysogenic cycle, virus particles are produced and assembled within the host cell.

A fossilized fish is found that has jaws but no true bones. Where does this fossil belong on the cladogram?

• A

• B

• C

• D

In a cladogram, when does a group of organisms branch off?

• when an ancestor becomes extinct

• when it is discovered

• when a new trait evolves

• when it becomes large enough

Scientists notice structural similarities between fossils of a land animal and an aquatic organism. They know the similarities are not a result of the two organisms having to adapt to similar environments. What can they attribute the structural similarities to?

• convergent evolution

• common ancestry

• transitional evolution

• similar mating habits

Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?

• analogous structures

• homologous structures

• vestigial structures

• mutated structures

Which best describes the fossil record?

• The fossil record cannot provide evidence of evolution.

• The fossil record provides evidence of a common ancestor to many species.

• The fossil record provides evidence that disputes the theory of evolution.

• The fossil record is inaccurate because scientists are not able to date fossils.