FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 34: The Origin and Evolution of Vertebrates

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 41

Multiple Choice

Review LaterAdd Note

Review Later

Which of these are amniotes?

A) amphibians
B) fishes
C) turtles
D) lungfish

Correct Answer

verified

Show Answer

Question 42

Multiple Choice

Review LaterAdd Note

Review Later

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

A) a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates
B) an armoured, jawed placoderm with two pairs of appendages
C) an early ray-finned fish that developed bony skeletal supports in its paired fins
D) a salamander that had legs supported by a bony skeleton but moved with the side-to-side bending typical of fishes

Correct Answer

verified

Show Answer

Question 43

Multiple Choice

Review LaterAdd Note

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-metre-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) . -The class decided to humanely euthanise the organism and subsequently dissect it. Having decided that it was probably not a reptile, two of their original hypotheses regarding its identity remained. Which of the following, if observed, should help them arrive at a conclusive answer?

At one time, Chondrichthyes were thought to have split off from other vertebrates before the evolution of bone. Now we have concluded that the Chondrichthyes split off after the evolution of bone had started. This change demonstrates ________.

The evolution of similar insulating skin coverings such as fur, hair, and feathers in mammals and birds is a result of ________.

Which characteristic is common to all the modern representatives of all major reptilian lineages (turtles, lepidosaurs, crocodilians, and birds) ?

In what respect do hominins differ from all other anthropoids?

All chordates studied to date, except tunicates, share a set of ________.

Which of the following taxonomic groups is the most successful?

Which of the following is a characteristic of all chordates at some point during their life cycle?

Which of the following characteristics is shared by a hagfish and a lamprey?

Which of these traits is most strongly associated with the adoption of bipedalism?

Fishes that have swim bladders can regulate their density and, thus, their buoyancy. There are two types of swim bladder: physostomous and physoclistous. The ancestral version is the physostomous version, in which the swim bladder is connected to the oesophagus via a short tube (see the figure) . The fish fills this version by swimming to the surface, taking gulps of air, and directing them into the swim bladder. Air is removed from this version by "belching". The physoclistous version is more derived and has lost its connection to the oesophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swim bladder. -The presence of a swim bladder allows the typical ray-finned fish to stop swimming and still ________.

How did the evolution of the jaw contribute to diversification of early vertebrate lineages?

Which clade does not include humans?

What group of mammals have (a) embryos that spend more time feeding through the placenta than the mother's nipples, (b) young that feed on milk, and (c) a prolonged period of maternal care after leaving the placenta?

Scientific views are based on evidence rather than an appeal to authority. Which of the following statements demonstrates a conclusion based on an appeal to authority?

To reproduce, many plants produce seeds-structures containing embryonic offspring along with nutrients inside a tough coat. These offspring develop after being released by the parent plant. To which animal reproductive "strategy" is seed production most comparable?

Which of the following statements would be most acceptable to most zoologists?

Which clade does not include humans?