Evolution

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

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

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.

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

Scientists are studying the evolutionary history of a group of plants in the United States, and they developed an evolutionary tree, as shown below. What information about the organisms best helps the scientists to determine the evolutionary relationships among them?

• DNA sequences

• Anatomical features

• Habitat types

• Reproductive Strategies

Organisms classified as fungi have unique characteristics. Which of the following characteristics is found only in organisms classified in the kingdom fungi?

• single cells without a nucleus

• multicellular with chloroplasts

• multicellular filaments that absorb nutrients

• colonies of single, photosynthetic cells that reproduce asexually

The diagram below represents possible evolutionary pathways of certain organisms. Which species is most closely related to species L?

• Species E

• Species F

• Species G

• Species I

Which kingdoms have photosynthetic organisms?

• fungi and plants

• fungi and protists

• protists and plants

• plants and animals

Some characteristics of a recently discovered organism are listed in the following table. Based on the given characteristics, this organism would be classified in which kingdom?

• eubacteria

• fungi

• plantae

• protista

In 1990, Carl Woese introduced the three domain system for classifying living things, after the advancement of DNA analysis allowed for a comparison of species genetic code. Which of the following is the best explanation for why domains were added to the previous system of classification?

• The old system of classification was wrong and needed to be corrected.

• New species are evolving too quickly to keep up with the old system of classification

• Domains have always been included, they were just made official recently.

• Some organisms, which were previously characterized together, were determined to be genetically very different.