OCE Chap 14 Questions with Correct Answers (Grade A+)
Question 1: Which doesn't belong:
A. anal
B. caudal
C. dorsal
D. pelvic
E. ventral
Answer: E. ventral
Question 2: Which doesnt belong:
A. copepods
B. foraminiferans
C. krill
D. radiolarians
E. squid.
Answer: E. squid.
Question 3: How does sonar work? A gravitational signal is bounced off the ocean floor. An
electromagnetic signal is bounced off the ocean floor. An infrared signal is bounced off the ocean floor.
A laser signal is bounced off the ocean floor. A sound signal is bounced off the ocean floor.
Answer: a sound signal is bounced off the ocean floor
Question 4: What does sonar data tell us about the seafloor? depth, shape, and composition depth and
temperature depth and shape composition and depth depth, temperature, and composition
Answer: depth, shape, and composition
Question 5: How are echolocation and sonar different? Sonar and echolocation are two words for the
same process. Sonar is used by dolphins and whales, whereas echolocation is a data collection tool
developed by people. Echolocation is used by dolphins and whales, whereas sonar is a data collection
tool developed by people. Echolocation is used by dolphins, whereas sonar is used by whales and is a
data collection tool developed by people.
Answer: echolocation is used by dolphins and whales, whereas sonar is a data collection tool developed by
people
Question 6: Where do dolphins generate sounds for use in echolocation? in the mouth in the blowhole
in the nose in the melon
Answer: in the blowhole
Page 1
, Question 7: What does a dolphin's melon do? The melon makes sound waves during emission. The
melon focuses sound waves during emission. The melon focuses sound waves during reception. The
melon interprets sound waves during reception.
Answer: the melon focuses sound waves during emission
Question 8: Plates of baleen resemble what common household object? a dish drying rack a kitchen
utensil a vacuum a light bulb a broom
Answer: a broom
Question 9: One of the prey items of baleen whales are krill. What are krill? a type of marine
macro-algae a type of barnacle small shrimp-like organisms small fish a type of shellfish related to
mussels
Answer: small shrimp-like organisms
Question 10: What side of the baleen faces inside the mouth on a living whale? the smooth side the
bottom side the more fibrous side the top side
Answer: the more fibrous side
Question 11: How do grey whales collect and eat such small organisms? They use cooperative behavior
to corral prey into a group and then swallow their prey items whole. They emit high-pitched sounds
that drive their prey items into tight masses. They use their countershading to sneak up on their prey
items. They use their baleen to filter prey items from their environment. They use a technique called
bubble-net feeding.
Answer: They use their baleen to filter prey items from their enviroment
Question 12: Why was the seawall contructed in La Jolla? To divert sand to the beach behind the
seawall so a recreational beach would develop there. To create a quiet beach behind the seawall that is
free of large waves so that children can safely use the beach. To protect the coastal cliffs, which were
eroding away much faster than normal. To make a boat anchorage where the yacht owners of La Jolla
can easily reach their boats. To make a place for harbor seals and other animals to use for their
birthing activities.
Answer: to create a quiet beach behind the seawalls that is free of large waves so that children can safely use
the beach
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Question 1: Which doesn't belong:
A. anal
B. caudal
C. dorsal
D. pelvic
E. ventral
Answer: E. ventral
Question 2: Which doesnt belong:
A. copepods
B. foraminiferans
C. krill
D. radiolarians
E. squid.
Answer: E. squid.
Question 3: How does sonar work? A gravitational signal is bounced off the ocean floor. An
electromagnetic signal is bounced off the ocean floor. An infrared signal is bounced off the ocean floor.
A laser signal is bounced off the ocean floor. A sound signal is bounced off the ocean floor.
Answer: a sound signal is bounced off the ocean floor
Question 4: What does sonar data tell us about the seafloor? depth, shape, and composition depth and
temperature depth and shape composition and depth depth, temperature, and composition
Answer: depth, shape, and composition
Question 5: How are echolocation and sonar different? Sonar and echolocation are two words for the
same process. Sonar is used by dolphins and whales, whereas echolocation is a data collection tool
developed by people. Echolocation is used by dolphins and whales, whereas sonar is a data collection
tool developed by people. Echolocation is used by dolphins, whereas sonar is used by whales and is a
data collection tool developed by people.
Answer: echolocation is used by dolphins and whales, whereas sonar is a data collection tool developed by
people
Question 6: Where do dolphins generate sounds for use in echolocation? in the mouth in the blowhole
in the nose in the melon
Answer: in the blowhole
Page 1
, Question 7: What does a dolphin's melon do? The melon makes sound waves during emission. The
melon focuses sound waves during emission. The melon focuses sound waves during reception. The
melon interprets sound waves during reception.
Answer: the melon focuses sound waves during emission
Question 8: Plates of baleen resemble what common household object? a dish drying rack a kitchen
utensil a vacuum a light bulb a broom
Answer: a broom
Question 9: One of the prey items of baleen whales are krill. What are krill? a type of marine
macro-algae a type of barnacle small shrimp-like organisms small fish a type of shellfish related to
mussels
Answer: small shrimp-like organisms
Question 10: What side of the baleen faces inside the mouth on a living whale? the smooth side the
bottom side the more fibrous side the top side
Answer: the more fibrous side
Question 11: How do grey whales collect and eat such small organisms? They use cooperative behavior
to corral prey into a group and then swallow their prey items whole. They emit high-pitched sounds
that drive their prey items into tight masses. They use their countershading to sneak up on their prey
items. They use their baleen to filter prey items from their environment. They use a technique called
bubble-net feeding.
Answer: They use their baleen to filter prey items from their enviroment
Question 12: Why was the seawall contructed in La Jolla? To divert sand to the beach behind the
seawall so a recreational beach would develop there. To create a quiet beach behind the seawall that is
free of large waves so that children can safely use the beach. To protect the coastal cliffs, which were
eroding away much faster than normal. To make a boat anchorage where the yacht owners of La Jolla
can easily reach their boats. To make a place for harbor seals and other animals to use for their
birthing activities.
Answer: to create a quiet beach behind the seawalls that is free of large waves so that children can safely use
the beach
Page 2
