✅ Correct Answer: Felis catus
Source: This question is taken from the Everyday Science
✅ Correct Answer: Observation
✅ Correct Answer: Proportion
✅ Correct Answer: Both a and b
✅ Correct Answer: Mathematical biology
✅ Correct Answer: Apoptosis
✅ Correct Answer: Biomes
✅ Correct Answer: Atom → Molecule → Cell → Tissue → Organ
✅ Correct Answer: Gamma rays
✅ Correct Answer: Acclimatization
✅ Correct Answer: Hypothesis → Reasoning → Theory → Law
✅ Correct Answer: Nucleic acids