Unit 6 Midterm Review

What can be determined about the relative ages of the fossils shown in the picture?

• Fossils A2, B1, and C3 were formed more recently than fossils A5, B4, and C6.

• Fossils A5, B4, and C6 were formed more recently than fossils A2, B1, and C3.

• All fossils were formed at the same geological time.

• Fossil A2 was the first fossil to show bony structures.

The similarity in structure displayed between the frog and human limbs indicate that

• the humerus (green bone) is the same size in all organisms

• Only mammals have a humerus.

• Both limbs have the same functions.

• the organisms have common ancestors

A science researcher concluded that two different fish species may share a common ancestor. Which of the following evidence may support his conclusion?

• Both species live in the same habitat

• Both species eat the same food

• Both species are scavengers

• Both species share similar genes.

Four species of frogs within the same genus are found on various channel islands off the coast of California. The oldest species is found on Anacapa and the youngest is found on Santa Rosa. What can be inferred about the location of these species' common ancestor?

• The common ancestor of the frogs first colonized the island of San Nicolas

• The ancestors of each species came from different continents at different times

• The common ancestor of the frogs probably came from California.

• The ancestor came from Alaska

A Turtle and a Tortoise are shown above. What do these two pictures suggest about these species?

• They can mate with each other

• They live in the same habitat

• They eat the same food.

• They share a common ancestor

 Look at the table below regarding the legs of several species. After reviewing the table circle which choice you think is the most likely conclusion.

• All bones must not be important for survival

• All bones still exist because all animals live in the same habitat

• All bones still exist because they are useful for survival and they must come from a common ancestor.

• All bones still exist because they are useful for flying.

True or False: Fossils that contain Vestigial Structures are consistent with Common Ancestry because although they may not have been used they indicate a relationship to other organisms that used those structures.

• True

• False

Natural Selection winnows (removes) out the ​ (a)   causing ​ (b)   traits to spread throughout the population.

• Unfit
• Advantageous

In order for organisms to survive and pass on their genes, they must be fit to their environment. To be fit, they must

• Survive to old age

• Survive, find a mate, and produce offspring.

• Escape from predators.

• Be the strongest organism of the population.

True or False: Antibiotic resistance is caused due to natural selection.

• True

• False