Every Book Back multiple-choice question from Structural Organisation of Animals (10th Standard Science, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Explanation. Locomotion in leeches occurs through looping or crawling and swimming movements, which are driven by the contraction and relaxation of their body muscles.
Q2
The segments of leech are known as
A. Metameres (somites)Correct
B. Proglottids
C. Strobila
D. All the above
Explanation. The body of a leech is divided linearly into repetitive ring-like body segments called metameres or somites.
Q3
Pharyngeal ganglion in leech is a part of
A. Excretory system
B. Nervous systemCorrect
C. Reproductive system
D. Respiratory system
Explanation. The pharyngeal ganglion consists of nerve cell clusters that form part of the central nervous system in leeches.
Q4
The brain of leech lies above the
A. Mouth
B. Buccal Cavity
C. PharynxCorrect
D. Crop
Explanation. The brain of a leech is formed by the suprapharyngeal ganglion, which is positioned above the pharynx.
Q5
The body of leech has
A. 23 segments
B. 33 segmentsCorrect
C. 38 segments
D. 30 segments
Explanation. The body of the Indian cattle leech is metamerically divided into exactly thirty-three segments throughout its life.
Q6
Mammals are ______________ animals.
A. Cold blooded
B. Warm bloodedCorrect
C. Poikilothermic
D. All the above
Explanation. Mammals are warm-blooded or homeothermic animals capable of maintaining a constant internal body temperature despite environmental changes.
About these Structural Organisation of Animals questions
These are the Book Back multiple-choice questions for Structural Organisation of Animals from the Tamil Nadu State Board (Samacheer Kalvi) 10th Standard Science syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Structural Organisation of Animals?
This chapter has 6 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 10th Standard Science MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Structural Organisation of Animals book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
