Question 41:
Which type of animal is known for having a notochord at some stage of its life cycle?
A) Insect
B) Fish
C) Annelid
D) Cnidarian
Answer: B) Fish
Explanation: Fish are chordates, and they have a notochord during their embryonic development, which is a characteristic of the phylum Chordata.
Question 42:
What type of symmetry do jellyfish exhibit?
A) Bilateral symmetry
B) Radial symmetry
C) Asymmetry
D) Pentaradial symmetry
Answer: B) Radial symmetry
Explanation: Jellyfish exhibit radial symmetry, allowing them to be divided into similar sections around a central point.
Question 43:
Which of the following is a function of the skeletal system in vertebrates?
A) Insulation
B) Blood production
C) Respiration
D) Digestion
Answer: B) Blood production
Explanation: The skeletal system in vertebrates includes bone marrow, which is responsible for the production of blood cells.
Question 44:
Which of the following is a characteristic of reptiles?
A) Laying eggs in water
B) Moist skin
C) Scales
D) Mammary glands
Answer: C) Scales
Explanation: Reptiles have scales that help prevent water loss and provide protection.
Question 45:
Which type of animal has a closed circulatory system?
A) Fish
B) Insects
C) Jellyfish
D) Sponges
Answer: A) Fish
Explanation: Fish have a closed circulatory system where blood is contained within vessels, allowing for efficient transport of oxygen and nutrients.
Question 46:
Which of the following animals is a marsupial?
A) Lion
B) Kangaroo
C) Dolphin
D) Ostrich
Answer: B) Kangaroo
Explanation: Kangaroos are marsupials, characterized by giving birth to underdeveloped young that continue to develop in a pouch.
Question 47:
Which structure in mammals is primarily responsible for the exchange of gases?
A) Gills
B) Lungs
C) Skin
D) Heart
Answer: B) Lungs
Explanation: Lungs are the primary respiratory organs in mammals, facilitating the exchange of oxygen and carbon dioxide.
Question 48:
Which type of organism is most likely to have a cuticle?
A) Fish
B) Amphibians
C) Reptiles
D) Birds
Answer: C) Reptiles
Explanation: Reptiles have a tough, protective outer covering called a cuticle that helps to prevent water loss.
Question 49:
Which of the following is a defining characteristic of the phylum Arthropoda?
A) Soft-bodied
B) Segmented body
C) Radial symmetry
D) No true tissues
Answer: B) Segmented body
Explanation: Arthropods, such as insects and crustaceans, have a segmented body plan and an exoskeleton.
Question 50:
What type of fertilization do most reptiles undergo?
A) External fertilization
B) Internal fertilization
C) Parthenogenesis
D) Budding
Answer: B) Internal fertilization
Explanation: Most reptiles reproduce via internal fertilization, where the male fertilizes the female’s eggs inside her body.
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