Example 1 · difficulty 4/5
Different animal phyla possess characteristic organs for excretion or balance. Select the CORRECTLY matched pair:
- A. Nephridia – Cockroach
- B. Malpighian tubules – Prawn
- C. Flame cells – Earthworm
- D. Statocysts – Pila
2023 source guide · Biology
NEET 2023 Biology Questions
Use this page to connect the official 2023 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 1/5
Phylum Chordata is defined by a set of fundamental characters present at least during some stage of the life cycle. Which of the following is NOT a defining character of chordates?
- A. Ventral, solid nerve cord
- B. Dorsal, hollow nerve cord
- C. Paired pharyngeal gill slits
- D. Post-anal tail
Example 3 · difficulty 2/5
Reptiles are generally described as having a three-chambered heart. However, one member of class Reptilia possesses a completely four-chambered heart. Identify it:
- A. Calotes (garden lizard)
- B. Chelone (turtle)
- C. Crocodilus (crocodile)
- D. Naja (cobra)
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
The Living World →Biological Classification →Plant Kingdom →Animal Kingdom →Morphology of Flowering Plants →Anatomy of Flowering Plants →Structural Organisation in Animals →Cell: The Unit of Life →Biomolecules →Cell Cycle and Cell Division →Photosynthesis in Higher Plants →Respiration in Plants →Plant Growth and Development →Breathing and Exchange of Gases →Body Fluids and Circulation →Excretory Products and their Elimination →Locomotion and Movement →Neural Control and Coordination →Chemical Coordination and Integration →Sexual Reproduction in Flowering Plants →Human Reproduction →Reproductive Health →Principles of Inheritance and Variation →Molecular Basis of Inheritance →Evolution →Human Health and Disease →Microbes in Human Welfare →Biotechnology: Principles and Processes →Biotechnology and its Applications →Organisms and Populations →Ecosystem →Biodiversity and Conservation →
Frequently asked questions
Are these official NEET 2023 Biology PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2023 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.