Heredity and Evolution

Front

According to fossil records, the horses that lived 50 million years ago were much smaller, weaker and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses?

Back

evolution by natural selection

Front

Which statement below most closely explains the link between jaw size and hominid evolution?

Back

The jaws of hominids evolved to be smaller and less protruding over time.

Front

What can be determined by observing the embryos shown in the diagram? Options: The organisms share a common ancestry, The organisms belong to the same genus, The organisms are native to the same geographic areas, The organisms will grow into anatomically similar adults.

Back

The organisms share a common ancestry.

Front

From the evolutionary tree of a group of plants in the United States, which species is most closely related to Species 5?

Back

Species 5 is most closely related to Species 6.

Front

Change over time...

Back

Evolution

Front

Which of the following is NOT an example of natural selection? Options: People selectively breeding hamsters., Insect populations developing resistance to certain pesticides., Bacteria becoming resistant to antibiotics., Male birds of certain species developing colorful feathers to attract female mates.

Back

People selectively breeding hamsters.

Front

How did the environmental changes during the Industrial Revolution in Manchester, England, affect peppered moths?

Back

Natural selection favored moths with dark wings because predators could not see them on the soot-colored trees.

Front

Two organisms that are closely related would have

Back

very similar DNA sequence

Front

When a layer of rock cuts through the other layers

Back

the layer that cut through is younger than the layers it cuts through

Front

What would indicate that a series of fossils represent evolution?

Back

the fossils show similarities