BIO 101 EXAM 4 TEST 2026 VERIFIED
QUESTIONS AND ANSWERS PASS GUIDE
◉ All of the following represent diagnostic features of chordates
except for which one?
Answer: vertebrae
◉ If a tunicate's pharyngeal gill slits were blocked by a foreign
object, which of the following processes would the organism have
trouble performing?
Answer: respiring and feeding
◉ In early chordates, the primitive pharyngeal slits carried out
which of the following functions?
Answer: suspension-feeding devices
◉ Which of the following is a characteristic of all chordates at some
point during their life cycle?
Answer: post-anal tail
◉ A new species of aquatic chordate is discovered that closely
resembles an ancient form. It has the following characteristics:
,external armor of bony plates, no paired lateral fins, and a
suspension-feeding mode of nutrition. In addition to these, which of
the following characteristics is it most likely to exhibit?
Answer: no jaws
◉ Which of the following characteristics is shared by a hagfish and a
lamprey?
Answer: a well-developed notochord
◉ Jaws evolved __________.
Answer: by modification of the skeletal rods that previously
supported the anterior pharyngeal gill slits
◉ The diagnostic feature of Chondrichthyes is __________.
Answer: an endoskeleton of cartilage
◉ Which of these statements accurately describes a similarity
between sharks and ray-finned fishes?
Answer: they have a lateral line that is sensitive to vibrations
◉ In a typical ray-finned fish, the swim bladder allows individuals to
perform which of the following processes?
Answer: remain buoyant
, ◉ Which of following reproductive strategies in mammals involves
the mother laying eggs that hatch outside of her body?
Answer: oviparous reproduction
◉ Which structure in a shark is closest in function to a swim bladder
in a ray-finned fish?
Answer: its liver
◉ If a ray-finned fish is to both hover (remain stationary) in the
water column and ventilate its gills effectively, then what other
structure besides its swim bladder will it use?
Answer: its operculum
◉ In which of the following ways did the evolution of the jaw
contribute to diversification of early vertebrate lineages?
Answer: It made additional food sources available.
◉ Which of these structures would most likely have been observed
in the common ancestor of chondrichthyans and osteichthyans?
Answer: a mineralized, bony skeleton
◉ Jaws first occurred in which of the following group of fishes?
QUESTIONS AND ANSWERS PASS GUIDE
◉ All of the following represent diagnostic features of chordates
except for which one?
Answer: vertebrae
◉ If a tunicate's pharyngeal gill slits were blocked by a foreign
object, which of the following processes would the organism have
trouble performing?
Answer: respiring and feeding
◉ In early chordates, the primitive pharyngeal slits carried out
which of the following functions?
Answer: suspension-feeding devices
◉ Which of the following is a characteristic of all chordates at some
point during their life cycle?
Answer: post-anal tail
◉ A new species of aquatic chordate is discovered that closely
resembles an ancient form. It has the following characteristics:
,external armor of bony plates, no paired lateral fins, and a
suspension-feeding mode of nutrition. In addition to these, which of
the following characteristics is it most likely to exhibit?
Answer: no jaws
◉ Which of the following characteristics is shared by a hagfish and a
lamprey?
Answer: a well-developed notochord
◉ Jaws evolved __________.
Answer: by modification of the skeletal rods that previously
supported the anterior pharyngeal gill slits
◉ The diagnostic feature of Chondrichthyes is __________.
Answer: an endoskeleton of cartilage
◉ Which of these statements accurately describes a similarity
between sharks and ray-finned fishes?
Answer: they have a lateral line that is sensitive to vibrations
◉ In a typical ray-finned fish, the swim bladder allows individuals to
perform which of the following processes?
Answer: remain buoyant
, ◉ Which of following reproductive strategies in mammals involves
the mother laying eggs that hatch outside of her body?
Answer: oviparous reproduction
◉ Which structure in a shark is closest in function to a swim bladder
in a ray-finned fish?
Answer: its liver
◉ If a ray-finned fish is to both hover (remain stationary) in the
water column and ventilate its gills effectively, then what other
structure besides its swim bladder will it use?
Answer: its operculum
◉ In which of the following ways did the evolution of the jaw
contribute to diversification of early vertebrate lineages?
Answer: It made additional food sources available.
◉ Which of these structures would most likely have been observed
in the common ancestor of chondrichthyans and osteichthyans?
Answer: a mineralized, bony skeleton
◉ Jaws first occurred in which of the following group of fishes?
