Exam 17: The Evolution of Animals

Art Questions -Flatworms are similar to cnidarians in that both ________.

There are more species of ________ than of any other type of animal.

Humans are chordates.Which animal group is most closely related to chordates?

The common ancestor of all animals is likely to have been a ________.

The segmented body of the worm below suggests that it is a(n)________.

Which of these exhibits radial symmetry?

Nearly all ________ are aquatic.

How do New World monkeys differ from Old World monkeys?

The arthropod skeleton is composed of ________.

You encounter an insect with small eyes,long sensory antennae,and a long mouthpart shaped like a sword.What can you conclude about the environment in which it lives?

Scenario Questions Read the following scenario to answer the following questions. Birds are a widespread group of animals with approximately 10,000 different species found throughout the world today. Because they are relatively easy to find and so visually appealing, they have been studied more thoroughly than many other groups of animals. They are also valuable biological indicators because many species live in different habitats during different times of the year and cover long migration routes. According to the World Conservation Union, extinction threatens over 1,200 bird species today, and at least 179 are critically endangered. Some of the most endangered species include the Tahiti monarch, with only 10 pairs remaining, and the Bali starling, with only 12 wild individuals left. In Hawaii, the last captive po'ouli died in 2005, and the last two known to be alive in the wild have not been seen since 2003-2004. Common birds are also disappearing. In North America, red-winged blackbird populations declined by at least 1 percent each year between 1980 and 1999. These examples can serve as a warning. Habitat loss through destruction, degradation, and fragmentation are serious problems that affect 86 percent of threatened birds and are exacerbated by unsustainable forestry practices and intensifying agriculture. All of this shows that conservation of habitats is critical if many of the world's bird species are going to be saved from extinction in the near future. -What is a feature of birds that makes them valuable as biological indicators?

How do sponges differ from all other animals?

Rays are a type of ________.

A characteristic that is shared by snakes and birds is ________.

What type of symmetry does this organism exhibit?

You discover an organism that has scaly skin and is aquatic but returns to the land to reproduce.What else would you expect to find in this organism?

Art Questions -Annelids are most closely related to ________.

Which of these human characteristics is hypothesized to have evolved first?

-According to this evolutionary tree,how would you characterize a new anthropoid specimen discovered and estimated to be approximately 42 million years old?

What does the term "tetrapod" mean?