Question 81:
Which of the following is a common characteristic of all chordates?
A) Presence of scales
B) Presence of a notochord
C) Mammary glands
D) Lungs
Answer: B) Presence of a notochord
Explanation: All chordates possess a notochord at some stage in their development, which serves as a supportive structure.
Question 82:
Which type of animal is characterized by having a tough outer cuticle?
A) Mollusks
B) Annelids
C) Echinoderms
D) Arthropods
Answer: D) Arthropods
Explanation: Arthropods have a tough outer cuticle (exoskeleton) made of chitin, providing protection and support.
Question 83:
Which of the following animals is known for its ability to survive in extreme conditions, such as high radiation?
A) Tardigrade
B) Ant
C) Shark
D) Frog
Answer: A) Tardigrade
Explanation: Tardigrades, also known as water bears, are microscopic animals renowned for their resilience in extreme environments.
Question 84:
Which of the following groups has members that are primarily marine and exhibit filter feeding?
A) Annelida
B) Mollusca
C) Arthropoda
D) Echinodermata
Answer: D) Echinodermata
Explanation: Echinoderms, like sea stars and sea cucumbers, primarily live in marine environments and often filter feed on small particles.
Question 85:
What is the main purpose of the lateral line system in fish?
A) Digestion
B) Sensory perception
C) Respiration
D) Circulation
Answer: B) Sensory perception
Explanation: The lateral line system helps fish detect vibrations and changes in water pressure, aiding in navigation and prey detection.
Question 86:
Which of the following animals is known for having a unique feeding structure called a radula?
A) Snail
B) Octopus
C) Crab
D) Sea star
Answer: A) Snail
Explanation: Snails use a radula, a tongue-like organ with tiny teeth, to scrape food from surfaces.
Question 87:
What type of habitat do amphibians typically require for reproduction?
A) Terrestrial
B) Aquatic
C) Both A and B
D) None of the above
Answer: B) Aquatic
Explanation: Amphibians typically lay their eggs in water, where the larvae (tadpoles) develop.
Question 88:
Which of the following is a characteristic of the phylum Porifera?
A) Radial symmetry
B) Presence of tissues
C) No true tissues or organs
D) Complete digestive system
Answer: C) No true tissues or organs
Explanation: Sponges (Porifera) lack true tissues and organs, making them one of the simplest animal groups.
Question 89:
Which of the following animals can change color for communication or camouflage?
A) Shark
B) Chameleon
C) Dolphin
D) Ant
Answer: B) Chameleon
Explanation: Chameleons have specialized cells in their skin that allow them to change color for communication and camouflage.
Question 90:
Which of the following is NOT a characteristic of mammals?
A) Hair or fur
B) Laying eggs
C) Warm-blooded
D) Mammary glands
Answer: B) Laying eggs
Explanation: While some mammals (monotremes) lay eggs, most mammals give birth to live young, which is a defining characteristic.
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