1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? Humans and other multicellular organisms have large bodies and require a lot of oxygen to reach ...

CBSE Class 10 Science Notes: Revision is the key to success in every exam. It not only helps reinforce your understanding of concepts but also builds confidence and ensures better recall during the ...

CBSE Class 10 Science Study Plan 2025: The time has come when students must start focusing on the 2025 Board examination. But before doing that, students should have a detailed and comprehensive study ...