Download Zoology Study Guide CH 33 Comparing Chordates

Zoology Study Guide CH 33 Comparing Chordates
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A phylogenic tree shows (like on page 850) shows that all chordates evolved from
_______________________________________________.
Pikaia was an early ____________________.
A flexible, supporting structure found only in chordates is the ________.
The backbone is characteristic of all ___________________.
Convergent evolution is the process that produces closely related species that are similar in
______________ & ____________________.
The resemblance of the flying squirrel of North America-a placental mammal…to the sugar glider of
Australia- a marsupial…(both animals are nocturnal, live in trees, and can glide through the air using a flap
of skin that stretches between the legs on each side of the body)…is an example of
________________________________________.
_______________=rapid growth in the DIVERSITY of a group of organisms.
The largest living group of chordates is the _______________.
Compared with the number of extinct chordate species, the number of living species is much
______________________ (larger or smaller?).
Essential life functions are carried out most efficiently when an animal’s internal body temperature is
within ______________________________________________.
In vertebrates, what three things are important in regulating body temperature?
Name two characteristics that help mammals retain body heat.
Panting is a behavior seen most often in ________________ that need to _______________________.
The main difference between ectotherms & endotherms is the source of their
________________________.
List 6 examples of filter feeders.
The digestive tract of a herbivore is ___________ when compared to a carnivore. How long would you
expect the digestive tract of an omnivore to be in comparison to herbivores and carnivores?
What is the function of the colonies of bacteria that live in the cow’s intestines?
The general rule regarding respiratory organs in chordates is that aquatic
chordates______________________________________ and land vertebrates
___________________________________________.
List 4 chordate respiratory structures.
What is the main difference between an amphibian lung and a reptilian lung?
A _________________ loop circulatory system is characteristic of fishes.
Describe the chambers of a fishes heart.
The sets of bones that support the limbs of vertebrates are called _______________________.
Almost all chordates reproduce ___________________________.
Reproduction in mammals involves _________________ fertilization and ________________________
development.
In a cladogram of modern chordates, ____________________ is the adaptation that separates reptiles,
birds, and mammals from other chordate groups.
The ability of birds & bats to fly is an example of _______________________________________.
In environments where temperatures are high and fairly constant most of the time,
___________________ is a more energy-efficient method of controlling body temperature.
A(n) _____________________ is an animal whose body temperature is controlled mainly by the transfer
of heat between its body and its surroundings.
If an animal has a 4 chambered heart, it has a(an) ______________-loop circulatory system.
Identify the four features common to all chordates.