NEET Biology: Animal systems anatomy and functions (insect/Frog) Practice Questions
13 free multiple-choice questions on Animal systems anatomy and functions (insect/Frog) (Structural Organisation in Animals and Plants) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Which structure is responsible for osmoregulation in insects, maintaining internal water balance?
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Correct answer: D — Malpighian bodies
In insects, the Malpighian bodies are the primary excretory organs responsible for osmoregulation and excretion.
Q2. Frog skin is characteristically moist and permeable. This is primarily due to the presence of:
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Correct answer: D — Mucous glands
The moist, permeable skin of frogs is due to the presence of numerous mucous glands that secrete mucus, which facilitates respiration and excretion.
Q3. The circulatory system in insects is classified as:
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Correct answer: C — Open system
In insects, the blood flows into open sinuses (hemocoel) and bathes the internal organs directly, making it an open circulatory system.
Q4. The exoskeleton of an insect is primarily made up of which material?
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Correct answer: A — Chitin
The exoskeleton of insects is composed of chitin, which provides rigidity and protection to the body.
Q5. Which of the following is the characteristic feature of the excretory system in insects?
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Correct answer: A — Malpighian tubules
Insects possess Malpighian tubules which function similarly to kidneys in excreting waste from the blood, rather than true nephridia found in annelids or molluscs.
Q6. In the anatomy of an insect, nerve cell clusters are known as:
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Correct answer: B — Ganglia
Nerve cells are grouped together in clusters called ganglia, which serve as the basic functional units of the nervous system.
Q7. Which tissue is found in the walls of internal organs, such as the stomach and intestines of an animal?
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Correct answer: D — Muscular tissue
Muscular tissue is essential for the movement of internal organs (peristalsis) and overall body movements.
Q8. Which feature distinguishes the nervous system organization in a frog (Vertebrate) compared to an insect (Invertebrate)?
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Correct answer: D — Both A and C
Vertebrates (like frogs) possess a centralized nervous system with a distinct brain and spinal cord, while insects rely on segmental ganglia organized along the nerve cord.
Q9. The blood in a frog circulates through a closed circulatory system. Which component of the circulatory system is responsible for pumping the blood?
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Correct answer: D — Heart
The heart in frogs is a muscular organ that pumps the blood throughout the closed circulatory system, ensuring delivery of oxygen and nutrients.
Q10. The circulatory system in an insect is primarily a closed system, while in a frog, it is an open system. Which statement is true regarding the blood vessels?
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Correct answer: A — Insect blood vessels are open, and frog blood vessels are closed.
Insect circulatory systems (hemocoel) are open, meaning blood flows freely into the body cavity. Frog circulatory systems are generally closed, with blood confined within vessels.
Q11. Which type of external skeleton is present in insects?
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Correct answer: C — Exoskeleton
Insects possess a rigid external skeleton made of chitin, known as the exoskeleton, which provides structural support.
Q12. In the frog, what is the main function of the skeleton (bones) in relation to the body?
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Correct answer: C — Providing structural support and protection
The skeleton provides the necessary framework, support, and protection for the internal organs of the frog.
Q13. The basic functional unit of the insect body, where specialized organs are organized, is known as:
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Correct answer: D — Ganglia
Ganglia are clusters of nerve cells that form the basic structural and functional units of the insect nervous system.
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