What was the Reptilia assertion-reason question in NEET 2026?
The NEET 2026 assertion-reason question on Reptilia had Statement I linking the class name directly to creeping or crawling locomotion and Statement II claiming every member of the class possesses a three-chambered heart. The four options were both statements correct, both incorrect, only I correct, or only II correct. The correct choice is only I correct.
Statement I matches the Latin root. Statement II fails on the absolute term "every" because NCERT lists one exception. This question tests whether you verify absolute language against exact textbook exceptions instead of stopping at the general three-chambered heart rule.
What is the complete official solution to the Reptilia NEET 2026 question?
The official solution selects option C. Statement I is correct because the term Reptilia derives from the Latin word repere, which means to creep or crawl. This etymology confirms the locomotion link for lizards, snakes and turtles.
Most reptiles have a three-chambered heart with two atria and one ventricle. Crocodiles possess a complete four-chambered heart as the explicit exception listed in NCERT. Statement II uses the absolute term "every," so one exception makes it incorrect. Therefore I is correct and II is incorrect.
You can expect to complete this verification in under 45 seconds after you internalise the crocodile exception from NCERT.
What reasoning error leads to the wrong option in the Reptilia NEET 2026 question?
Students select the wrong option when they treat the three-chambered heart as a universal rule for the entire class without checking NCERT exceptions. They remember the general line from Class 11 that reptiles have a three-chambered heart and stop there. They fail to test the absolute word "all" against the crocodilian four-chambered heart.
This leads them to mark both statements correct and choose option A. The error comes from not treating every absolute qualifier as a red flag that demands an immediate exception recall.
What practice questions from Diversity in Living World match the Reptilia NEET 2026 pattern?
These three fresh items test parallel concepts from classification. Solve them before checking the answers.
Assertion-Reason 1
Statement I: Amphibians are placed in a separate class from reptiles primarily due to their moist glandular skin and anamniote eggs.
Statement II: Both groups possess a three-chambered heart with no exceptions.
Options follow the standard format.
Correct answer: C. Statement I matches NCERT separation criteria. Statement II is false because crocodiles provide the four-chambered exception among reptiles.
MCQ
Which reptile group possesses a four-chambered heart and what is its evolutionary significance?
A) Squamata – incomplete septum for partial mixing
B) Crocodilia – complete separation of oxygenated and deoxygenated blood
C) Testudines – three-chambered heart only
D) Rhynchocephalia – uricotelic excretion only
Answer: B. The four-chambered heart in crocodiles allows complete separation of blood circuits. This supports their predatory lifestyle even though they remain poikilothermic.
Statement-based question
Read the following statement and choose the correct evaluation: “All reptiles are cold-blooded animals that possess epidermal scales.”
A) True, matches every NCERT line with no exception
B) False, because some reptiles maintain constant body temperature
C) True for temperature but false for scales
D) False for both
Answer: A. All reptiles are poikilothermic and bear cornified epidermal scales. No documented exception exists for these two characters.
You can search the past-paper archive by chapter for more classification questions with worked solutions.
What NCERT facts on Reptilia must you remember for NEET 2026?
These precise facts from NCERT prevent the same error in future Reptilia or classification questions.
- Reptiles are amniotes with cornified epidermal scales and no external ear.
- Heart is three-chambered (2 atria + 1 ventricle with incomplete septum) except in crocodiles (4-chambered).
- They are poikilothermic, possess 12 pairs of cranial nerves, and show uricotelic excretion.
Memorise them as linked units: etymology with locomotion, heart with the crocodile exception, and the physiological traits. When any assertion uses “all” or “every,” recall this list in under ten seconds.
How do you tackle medium-difficulty assertion-reason questions in zoology within 45 seconds?
Evaluate Statement I and II completely independently against exact NCERT lines. Flag absolute qualifiers ("all", "every", "no") and instantly recall documented exceptions.
Link etymology, structural features and exceptions in one 15-second mental cross-check. For the Reptilia item this means repere confirms Statement I, the three-chambered heart is true for most but "all" makes Statement II false due to crocodiles, therefore select C.
After ten practice items you can expect this sequence to become automatic based on consistent NCERT patterns.
When a similar doubt appears in your mock test, photograph the question for a step-by-step solution.
Next step: photograph a doubt on NEET JEEnius AI and photograph any question you are stuck on and get a step-by-step solution across Physics, Chemistry and Biology (20 free a month).
For a worked example of the same idea, see Oscillations and Waves NEET 2014: Correct Relation for n.
Frequently asked questions
What was the assertion reason question on Reptilia in NEET 2026?
Statement I linked the class Reptilia to creeping or crawling locomotion from the Latin root repere, which is correct. Statement II claimed every member possesses a three-chambered heart, which is incorrect due to the crocodile exception. The official answer is only Statement I is correct, corresponding to option C.
Why is Statement II incorrect in the Reptilia NEET 2026 question?
Most reptiles have a three-chambered heart but NCERT clearly lists crocodiles as having a complete four-chambered heart. The absolute term "every" makes Statement II false because of this single documented exception. Students must always verify absolute qualifiers against exact NCERT lines rather than general rules.
Which reptile has a four-chambered heart according to NCERT?
Crocodiles possess a four-chambered heart while other reptiles have a three-chambered heart with an incomplete septum. This exception is explicitly mentioned in NCERT Class 11 Biology under Diversity in Living World. It allows complete separation of oxygenated and deoxygenated blood.
How do you solve assertion reason questions on Reptilia for NEET?
Evaluate each statement independently against exact NCERT text. Flag absolute words like "every" or "all" and recall listed exceptions immediately. For Reptilia, confirm the Latin etymology for locomotion and the crocodile heart exception to select only I correct in under 45 seconds.