The bean crop farmer didn’t use nitrogen fertiliser because legumes like beans have root nodules that contain nitrogen-fixing bacteria. These bacteria naturally enrich the soil with nitrogen, reducing the need for additional fertilisers. Class 8 Science Grade 8 Chapter 2 The ...
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(i) After 3–4 days, the balloon on test tube B inflates. Yeast feeds on sugar and produces carbon dioxide gas. This gas collects in the balloon, causing it to expand. That’s why balloon B is inflated. Correct answer: (c) Yeast ...
In animal cells: nucleus, cytoplasm, cell membrane. In plant cells: all of the above plus cell wall and chloroplasts. In bacterial cells: nucleoid, cell membrane and cytoplasm. Each cell type has unique features. Class 8 Science Grade 8 Chapter 2 The ...
Yes, microbes interact constantly—some help each other grow, while others compete or attack. These interactions affect health, soil fertility and food. Their microscopic relationships are as rich and diverse as those of larger organisms. Class 8 Science Curiosity Chapter 2 The ...
Seeing the hidden world would redefine what we consider “living.” Tiny organisms, though small, show complex behaviors. It would teach us that size doesn’t define importance and that life exists even beyond our usual perceptions. Class 8 Science Curiosity Chapter 2 ...