BIO 242: EXAM 3 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS /ALREADY
GRADED A+
Tunicates (sea squirts) belong to the subphylum:
a. Chordata
b. Mammalia
c. Craniata
d. Urochordata
e. Cephalochordata - CORRECT ANSWER ✔✔- D) Tunicates belong to the
subphylum Urochordata
Lymphatic vessels are very similar in form and function to which of the following?
a. Arteries
b. Capillaries
c. Veins
d. Bowman's Capsules
e. Bronchioles - CORRECT ANSWER ✔✔- C) Lymphatic vessels are very similar
in form and function to veins
Which of the following cell types is responsible for rapidly initiating a secondary
immune response?
a. Suppressor T cells
1
,b. Macrophages
c. T helper cells
d. Memory cells
e. Mast cells - CORRECT ANSWER ✔✔- D) Memory cells are responsible for
rapidly initiating a secondary immune response
Most of the oxygen is transported through the human body in which fashion?
a. Dissolved in the blood plasma
b. Dissolved in white blood cell cytoplasm
c. Bound to neon atoms attached to hemoglobin
d. As bicarbonate
e. Bound to the iron atom in hemoglobin - CORRECT ANSWER ✔✔- E) Most of
the oxygen is transported through the human body bound to the iron atom in the
hemoglobin
Which of the following groups is/are gnathostomes?
a. Bony fish
b. Lampreys
c. Sea squirts
d. Hagfish
e. Two of the above answers are correct - CORRECT ANSWER ✔✔- A) Bony
fish are gnathostomes
The Chordate group that has a rasping tongue with teeth, cartilaginous skeleton,
lacks jaws and vertebrae, retains the notochord, no paired appendages, and one pair
of semicircular canal
a. Lancelets
2
, b. Chondrichthyes
c. Hagfish
d. Bony fish
e. Lampreys - CORRECT ANSWER ✔✔- C) Chordate group that has rasping
tongue with teeth, cartilaginous skeleton, lacks jaws and vertebrae, retains the
notochord, no paired appendages, and one pair of semicircular canal are the
hagfish
A new species of vertebrate was discovered. It has a 3-chambered heart, lungs,
scales made of keratin, and limbs with five toes. Its entire life cycle occurs on land.
A knowledgeable biologist would also predict that it had:
a. Fur
b. Cartilaginous endoskeleton
c. An amniotic egg
d. Tunic of cellulose
e. Fins and an operculum - CORRECT ANSWER ✔✔- C) 3-chambered heart,
lungs, scaled made of keratin, limbs with 5 toes: Amniotic egg
The innermost extraembryonic membrane that surrounds the embryo
a. Allantois
b. Chorion
c. Amnion
d. Yolk sac - CORRECT ANSWER ✔✔- C) The amnion is the innermost
extraembryonic membrane surrounding the embryo
Bacteria in the large intestine produce which of the following materials (which is
absorbed by the large intestine)?
a. Vitamin A
3
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS /ALREADY
GRADED A+
Tunicates (sea squirts) belong to the subphylum:
a. Chordata
b. Mammalia
c. Craniata
d. Urochordata
e. Cephalochordata - CORRECT ANSWER ✔✔- D) Tunicates belong to the
subphylum Urochordata
Lymphatic vessels are very similar in form and function to which of the following?
a. Arteries
b. Capillaries
c. Veins
d. Bowman's Capsules
e. Bronchioles - CORRECT ANSWER ✔✔- C) Lymphatic vessels are very similar
in form and function to veins
Which of the following cell types is responsible for rapidly initiating a secondary
immune response?
a. Suppressor T cells
1
,b. Macrophages
c. T helper cells
d. Memory cells
e. Mast cells - CORRECT ANSWER ✔✔- D) Memory cells are responsible for
rapidly initiating a secondary immune response
Most of the oxygen is transported through the human body in which fashion?
a. Dissolved in the blood plasma
b. Dissolved in white blood cell cytoplasm
c. Bound to neon atoms attached to hemoglobin
d. As bicarbonate
e. Bound to the iron atom in hemoglobin - CORRECT ANSWER ✔✔- E) Most of
the oxygen is transported through the human body bound to the iron atom in the
hemoglobin
Which of the following groups is/are gnathostomes?
a. Bony fish
b. Lampreys
c. Sea squirts
d. Hagfish
e. Two of the above answers are correct - CORRECT ANSWER ✔✔- A) Bony
fish are gnathostomes
The Chordate group that has a rasping tongue with teeth, cartilaginous skeleton,
lacks jaws and vertebrae, retains the notochord, no paired appendages, and one pair
of semicircular canal
a. Lancelets
2
, b. Chondrichthyes
c. Hagfish
d. Bony fish
e. Lampreys - CORRECT ANSWER ✔✔- C) Chordate group that has rasping
tongue with teeth, cartilaginous skeleton, lacks jaws and vertebrae, retains the
notochord, no paired appendages, and one pair of semicircular canal are the
hagfish
A new species of vertebrate was discovered. It has a 3-chambered heart, lungs,
scales made of keratin, and limbs with five toes. Its entire life cycle occurs on land.
A knowledgeable biologist would also predict that it had:
a. Fur
b. Cartilaginous endoskeleton
c. An amniotic egg
d. Tunic of cellulose
e. Fins and an operculum - CORRECT ANSWER ✔✔- C) 3-chambered heart,
lungs, scaled made of keratin, limbs with 5 toes: Amniotic egg
The innermost extraembryonic membrane that surrounds the embryo
a. Allantois
b. Chorion
c. Amnion
d. Yolk sac - CORRECT ANSWER ✔✔- C) The amnion is the innermost
extraembryonic membrane surrounding the embryo
Bacteria in the large intestine produce which of the following materials (which is
absorbed by the large intestine)?
a. Vitamin A
3
