Question 51:
Which of the following animals has a two-chambered heart?
A) Mammals
B) Birds
C) Fish
D) Amphibians
Answer: C) Fish
Explanation: Fish have a two-chambered heart consisting of one atrium and one ventricle, which efficiently pumps blood through their gills and to the rest of the body.
Question 52:
What is the primary feeding structure in bivalves?
A) Radula
B) Beak
C) Gills
D) Tentacles
Answer: C) Gills
Explanation: Bivalves, like clams and oysters, use their gills for filter feeding, capturing food particles from the water.
Question 53:
Which of the following groups of animals primarily has a diet consisting of nectar and pollen?
A) Carnivores
B) Herbivores
C) Insectivores
D) Pollinators
Answer: D) Pollinators
Explanation: Pollinators, such as bees and butterflies, primarily feed on nectar and pollen from flowers.
Question 54:
What is the function of the spicules in sponges?
A) Reproduction
B) Structural support
C) Digestion
D) Respiration
Answer: B) Structural support
Explanation: Spicules provide structural support and protection to sponges, helping maintain their shape.
Question 55:
Which of the following best describes the reproductive strategy of frogs?
A) Oviparous
B) Viviparous
C) Ovoviviparous
D) Parthenogenetic
Answer: A) Oviparous
Explanation: Frogs are oviparous, laying eggs that develop externally, typically in water.
Question 56:
What type of circulatory system do arthropods have?
A) Closed circulatory system
B) Open circulatory system
C) Both A and B
D) None of the above
Answer: B) Open circulatory system
Explanation: Arthropods have an open circulatory system, where blood (hemolymph) bathes the organs directly in a hemocoel.
Question 57:
Which of the following animals is a filter feeder?
A) Goldfish
B) Whale shark
C) Tarpon
D) Great white shark
Answer: B) Whale shark
Explanation: The whale shark is a filter feeder that consumes plankton and small fish by filtering water through its gills.
Question 58:
Which of the following is a primary characteristic of annelids?
A) Soft-bodied
B) Segmented body
C) Hard exoskeleton
D) No true tissues
Answer: B) Segmented body
Explanation: Annelids, such as earthworms, have a segmented body structure, which allows for greater flexibility and movement.
Question 59:
What type of locomotion do most mollusks use?
A) Swimming
B) Walking
C) Jet propulsion
D) Crawling
Answer: D) Crawling
Explanation: Most mollusks, such as snails and slugs, use a muscular foot to crawl along surfaces.
Question 60:
Which of the following statements about cnidarians is true?
A) They have a complete digestive system.
B) They possess stinging cells called nematocysts.
C) They are exclusively terrestrial.
D) They have a closed circulatory system.
Answer: B) They possess stinging cells called nematocysts.
Explanation: Cnidarians, such as jellyfish and corals, have specialized cells called nematocysts that they use for capturing prey and defense.
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