Evolution Practice

Evolution Practice

Evolution Evidence

Fossil Record

Comparative Anatomy

Comparative Embryology

Biogeography

Molecular Biology

Observed evolutionary change

Evolution Scientist

Charles Darwin

Alfred Russel Wallace

Comparative anatomy

• Homologous Structures

• Analogous Structures

• Vestigial Structures

​Hominid Evolution

Brain Size

Jaw Size

Language

Manufacture tools

statement based on repeated experiments or observations that describe or predict a natural phenomena

​Law

Well-tested explanation based on observations and hypotheses of an event

​Theory

Multiple Choice

The scientific theory of evolution is supported by different types of evidence. The diagrams below show the skeletons of two different animal species. How does comparing the skeletons of these animals provide support for the scientific theory of evolution?

• It provides information about the organisms' habitats.

• It shows possible common ancestry between organisms.

• It provides information to determine the organisms' ages.

• It shows possible chromosomal similarities between organisms.

Multiple Choice

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?

• commensalism

• inbreeding

• migration

• evolution by natural selection

Multiple Choice

The diagram illustrates an embryonic stage of two organisms. Which of the following can be determined by observing the embryos shown in the diagram? 

• 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.

Multiple Choice

Scientists have found evidence that about 2.4 million years ago a gene regulating jaw muscles mutated and may have led to the more graceful human jaw we see today. The diagram below shows the skulls of 3 hominid species.

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

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

• The jaws of hominids evolved to be larger and more protruding over time. 

• There appears to be no change in the jaws of hominids over time.

• The jaws of hominids changed over time due to a change in brain size. 

Multiple Choice

Scientists are studying the evolutionary history of a group of plants in the United States, and they developed an evolutionary tree, as shown.

Which statement can be inferred from the evolutionary tree?

• Species 1 is most closely related to Species 8.

• Species 2 is most closely related to Species 3.

• Species 3 is most closely related to Species 7.

• Species 5 is most closely related to Species 6.

Multiple Choice

Scientists are studying the evolutionary history of a group of plants in the United States, and they developed an evolutionary tree, as shown.

What information about the organisms best helps the scientists to determine the evolutionary relationships among them?

• DNA sequences

• Anatomical features

• Habitat types

• eproductive StrategiesR