What do you understand by heterotrophic mode of nutrition ?
Heterotrophic nutrition : It is the nutrition in which organisms do not manufacture their own food but take food from external sources such as other living organisms or from dead and decaying matter. For example - animals are heterotrophic
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What are the forces which operate in passive diffusion ?
Why the cotyledons are removed from seedlings for performing cultural experiments ?
Name the four broad categories of essential elements.
