Energy Sources and Utilization — NEET Biology
📚 Practice ConceptAll living organisms need energy for carrying out daily life activities, be it absorption, transport, movement, reproduction or even breathing. Where does all this energy come from? We know we eat food for energy – but how is this energy taken from food? How is this energy utilised? Do all foods give the same amount of energy? Do plants 'eat'? Where do plants get their energy from? And micro-organisms – for their energy requirements, do they eat 'food'?
Which of the following statements are correct regarding the movement of gases in plants? S1. Simple diffusion is the predominant mechanism for gas exchange between the plant and its environment. S2. The presence of an interconnected network of air spaces within plant tissues facilitates efficient gas diffusion. S3. Gases are primarily transported against their concentration gradients through active transport in plants. S4. Diffusion distances for gases are significantly large in most plant living cells, necessitating bulk flow mechanisms. S5. Stomata and lenticels are structures that enhance the rate of gas diffusion by providing direct openings to the atmosphere.
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