Exam 34: Vertebrates

The following questions refer to the phylogenetic tree shown in Figure 34.1. -During chordate evolution, what is the sequence (from earliest to most recent)in which the following structures arose? 1) amniotic egg 2) paired fins 3) jaws 4) swim bladder 5) four-chambered heart

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Which organisms are represented by 6?

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Which of these would a paleontologist be most likely to do in order to determine whether a fossil represents a reptile or a mammal?

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Which pair of numbers includes extant endotherms?

For the following items, match the extant vertebrate groups with the descriptions. -Their scales closely resemble teeth in both structure and origin.

The following questions refer to the phylogenetic tree shown in Figure 34.1. -How are primates different from all other mammals?

The following questions refer to the description below. While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow). -Which one of these, if found, should clear up any remaining doubt as to the identity of the organism?

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Among extant vertebrates, a sheet of muscle called the diaphragm is found in

The following questions refer to the description below. Terry catches a ray-finned fish from the ocean and notices that, attached to its flank, there is an equally long, snakelike organism. The attached organism has no external segmentation, no scales, a round mouth surrounded by a sucker and two small eyes. Terry thinks it might be a marine leech, a hagfish, or a lamprey. -Terry saved some of the tooth-like objects within the hagfish's round mouth to analyze their composition in his mentor's biochemistry research lab. Terry will find that they are composed of the same protein found in reptilian

The swim bladder of ray-finned fishes

Which of the following could be considered the most recent common ancestor of living tetrapods?

Which of the following statements is correct in regard to Homo erectus?

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Whose DNA would have had the most sequence homologies with amphibian DNA?

The following questions refer to the phylogenetic tree shown in Figure 34.1. -Which pair of numbers most likely represents extant, nonbird reptiles?

The origin of the craniates occurred at roughly the same time as the

The following questions refer to the description below. While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow). -Most dinosaurs and pterosaurs become extinct at the close of the __________ era.

Which clade does not include humans?

A trend first observed in the evolution of the earliest tetrapods was

There is evidence that ray-finned fishes originally evolved

Which of these statements accurately describes a similarity between sharks and ray-finned fishes?