EXAM 4 BROOKS BIODIVERSITY
UPDATED ACTUAL QUESTIONS WITH CORRECT
ANSWERS
Question 1.
Class Hirudinea Anesthetic and Anticoagulants
ANSWER
These leeches have chemicals in their mouths and when they first latch on to their host they
apply an anesthetic to numb the area and then they release anticoagulants so the blood
doesn't clot
Anticoagulant - Hyrudin
Question 2.
4 Subphyla of Phylum Arthropoda
ANSWER
1. Subphylum Trilobitomorpha
2. Subphylum Chelicerata
3. Subphylum Crustacea
4. Subphylum Uniramia
Question 3.
Tadpole Larvae
ANSWER
Once fertilized, the tadpole larvae swims around like a fish, but in frogs the tadpole eventually
undergoes a metamorphosis to turn into a land dwelling animal
Question 4.
Abdomen in Subphylum Crustacea
ANSWER
1. Pleopods (Swimmerets)
2. Telson (Tail) - spike part
3. Uropod (Tail) - side part used for propulsion
,Question 5.
Uropygial Gland
ANSWER
Oil gland that birds use to cover its feathers so it doesn't have to dry itself
Question 6.
What class has the most efficient respiratory system?
ANSWER
Class Aves
Question 7.
Metamorphosis
ANSWER
i. Change from larval form to adult stage
ii. Class Insecta
iii. Subphylum Uniramia
iv. Phylum Arthropoda
Question 8.
2 Types of Subclass Theria
ANSWER
1. Metatherians
2. Eutherians
Question 9.
Order Dipneusti
ANSWER
Lungfishes
Dipneustians possess lungs and can aestivate***
These present-day fishes (as well as other types of fishes such as the walking catfish) show that
fishes could have easily evolved into air-breathing amphibians
,Question 10.
Metanephridia
ANSWER
Kidney
One in each segment in Annelids
Question 11.
Phylum Chordata
ANSWER
i. Bilateral Symmetry
ii. Deuterostomes
iii. Theory of Paedomorphosis
Question 12.
Second Hypothesis with Lancelets
ANSWER
Cephalochordates (such as lancelets) already have a fish-shaped adult form They use
pharyngeal gill slits to filter food, swim with lateral undulations (wave-like, similar to how
snakes slither), and has a brain (but no cranium) Neotany
Question 13.
Class Merostomata
ANSWER
Aquatic
Ex: Horseshoe crab (NOT A CRAB) is the main representative of this class, and Giant Water
Scorpion
Subphylum Chelicerata
Phylum Arthropoda
, Question 14.
Fossil Records
ANSWER
Australopithecus Afarensis
A. Boisei
A. Africanus
A. Robustus
Homo Habilis
Homo Erectus
Homo Sapiens
Question 15.
Class Hirudinea
ANSWER
"Leeches"
Mainly Freshwater and Terrestrial
Blood-Sucking Parasites
Facilitated by anesthetic and anticoagulants
Some are carnivorous
Preserve their food
Hemocoel/Hemolymph - open circulatory system
Coelom filled with Mesenchyme (tissue)
Generally lack parapodia, setae, and head appendages (don't need a head; makes it easier to
latch on without one
Clitellum present for reproduction
Phylum Annelida
Question 16.
Chorion
ANSWER
Used for gas exchange between the embryo and environment
Part of Amniotic Egg
UPDATED ACTUAL QUESTIONS WITH CORRECT
ANSWERS
Question 1.
Class Hirudinea Anesthetic and Anticoagulants
ANSWER
These leeches have chemicals in their mouths and when they first latch on to their host they
apply an anesthetic to numb the area and then they release anticoagulants so the blood
doesn't clot
Anticoagulant - Hyrudin
Question 2.
4 Subphyla of Phylum Arthropoda
ANSWER
1. Subphylum Trilobitomorpha
2. Subphylum Chelicerata
3. Subphylum Crustacea
4. Subphylum Uniramia
Question 3.
Tadpole Larvae
ANSWER
Once fertilized, the tadpole larvae swims around like a fish, but in frogs the tadpole eventually
undergoes a metamorphosis to turn into a land dwelling animal
Question 4.
Abdomen in Subphylum Crustacea
ANSWER
1. Pleopods (Swimmerets)
2. Telson (Tail) - spike part
3. Uropod (Tail) - side part used for propulsion
,Question 5.
Uropygial Gland
ANSWER
Oil gland that birds use to cover its feathers so it doesn't have to dry itself
Question 6.
What class has the most efficient respiratory system?
ANSWER
Class Aves
Question 7.
Metamorphosis
ANSWER
i. Change from larval form to adult stage
ii. Class Insecta
iii. Subphylum Uniramia
iv. Phylum Arthropoda
Question 8.
2 Types of Subclass Theria
ANSWER
1. Metatherians
2. Eutherians
Question 9.
Order Dipneusti
ANSWER
Lungfishes
Dipneustians possess lungs and can aestivate***
These present-day fishes (as well as other types of fishes such as the walking catfish) show that
fishes could have easily evolved into air-breathing amphibians
,Question 10.
Metanephridia
ANSWER
Kidney
One in each segment in Annelids
Question 11.
Phylum Chordata
ANSWER
i. Bilateral Symmetry
ii. Deuterostomes
iii. Theory of Paedomorphosis
Question 12.
Second Hypothesis with Lancelets
ANSWER
Cephalochordates (such as lancelets) already have a fish-shaped adult form They use
pharyngeal gill slits to filter food, swim with lateral undulations (wave-like, similar to how
snakes slither), and has a brain (but no cranium) Neotany
Question 13.
Class Merostomata
ANSWER
Aquatic
Ex: Horseshoe crab (NOT A CRAB) is the main representative of this class, and Giant Water
Scorpion
Subphylum Chelicerata
Phylum Arthropoda
, Question 14.
Fossil Records
ANSWER
Australopithecus Afarensis
A. Boisei
A. Africanus
A. Robustus
Homo Habilis
Homo Erectus
Homo Sapiens
Question 15.
Class Hirudinea
ANSWER
"Leeches"
Mainly Freshwater and Terrestrial
Blood-Sucking Parasites
Facilitated by anesthetic and anticoagulants
Some are carnivorous
Preserve their food
Hemocoel/Hemolymph - open circulatory system
Coelom filled with Mesenchyme (tissue)
Generally lack parapodia, setae, and head appendages (don't need a head; makes it easier to
latch on without one
Clitellum present for reproduction
Phylum Annelida
Question 16.
Chorion
ANSWER
Used for gas exchange between the embryo and environment
Part of Amniotic Egg
