Biology - Chpt 26

Question 0

What is the cladogram of invertebrates?

Answer 0

Current hypotheses about evolutionary relationship among major invertebrate groups

Question 1

Explain what fossil evidence says about the timing of evolution

Answer 1

THAT EVOLUTION IS A FARCE. NO TRANSITIONAL FOSSILS AND EXPLANATION FOR THE CAMBRIAN PERIOD

Scientists say pre-Cambrian Explosion
At end of Cambrian most modern phyla established
Invertebrates most abundant animals on earth now

Question 2

Describe ancient chordates

Answer 2

Bodies supported mainly by cartilage

Modern chordates are mostly vertebrates - fishes, amphibians, reptiles, birds, and mammals

Question 3

Interpret the cladogram (hypotheses) of chordates

Answer 3

That one group of ancient lobe finned fish EVOLVED into the ancestors of tetrapods, which are four limbed vertebrates

Question 4

Jaws and skeletons made of cartilage
These characteristics represent which chordate group?  
A. Jawless fishes
B. Sharks
C. Amphibians
D. Nonvertbrate chordates

Answer 4

B. Sharks

Question 5

Breath with lungs as adults, live in water as larvae but on land as adults.  These characteristics represent which chordate group?  
A. Jawless fishes
B. Sharks
C. Amphibians
D. Reptiles

Answer 5

C. Amphibians

Question 6

Can regulate internal body temperature.  Strong, yet lightweight bones.  These characteristics represent which chordate group?  
A. Mammals
B. Birds
C. Amphibians
D. Reptiles

Answer 6

B. Birds

Question 7

Have hair, breathe air, 4-chambered hearts, and regulate internal body temperature..These characteristics represent which chordate group?  
A. Mammals
B. Reptiles
C. Amphibians
D. Birds

Answer 7

A. Mammals

Question 8

Have dry, scaly skin.  Strong limbs and well-developed lungs.   Shelled eggs that do not develop in water.  These characteristics represent which chordate group?  
A. Jawless fishes
B. Sharks
C. Amphibians
D. Reptiles

Answer 8

D. Reptiles

Question 9

Lack vertebrae and have notochords as adults.  These characteristics represent which chordate group?  
A. Jawless fishes
B. Sharks
C. Amphibians
D. Nonvertbrate chordates

Answer 9

A. Jawless fishes

Question 10

Lack backbones 
These characteristics represent which chordate group?  
A. Jawless fishes
B. Sharks
C. Amphibians
D. Nonvertbrate chordates

Answer 10

D. Nonvertebrate chordates