Neet PYQ

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A. Correct: Clearing the Amazon rainforest for soyabean cultivation is a classic example of habitat loss and fragmentation.

B. Correct: Both Steller's sea cow and the passenger pigeon went extinct due to over-exploitation by humans.

C. Incorrect: The introduction of the Nile perch into Lake Victoria actually led to the extinction of more than 200 species of endemic cichlid fish, not their growth.

D. Correct: Water hyacinth (Eichhornia crassipes) is one of the world's most problematic invasive species, often referred to as the "Terror of Bengal."

E. Incorrect: When a species becomes extinct, the plant and animal species obligatorily associated with it also become extinct; this phenomenon is called co-extinction.

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Match List I with List II (NEET-2024)List I (Microorganism)List II (Product)(A) Clostridium butylicum. III. Butyric acid
(B) Saccharomyces cerevisiae. I.Ethanol
(C) Trichoderma polysporum

IV.Cyclosporin-A

(D)Streptococcussp. II.Streptokinase
Correct Match: A-III, B-I, C-IV, D-II
Correct Option: (3)

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✅ Answer: C) Lateral meristem
Explanation:
Lateral meristem (vascular cambium & cork cambium) increases girth (thickness) of plant stems and roots.
👉 Trick: “Lateral = width increase”

Biology Questions
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Biology questions
✅ Answer: Fluid mosaic model
Explanation:
The fluid mosaic model (proposed by Singer & Nicolson) explains that:
Lipids form a fluid bilayer
Proteins float within it like a mosaic
👉 This gives the membrane flexibility and dynamic nature

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