Nutrient Cycling Essentiale: Ecosystem Ecosystem Biology - XII NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Energy flow and nutrient cycling are two important components of an ecosystem. What will be true comparison of the two?

1.	The amount of energy is much greater than the amount of nutrients
2.	Organisms always need nutrients, but they don't always need energy
3.	Nutrients are recycled, but energy is not
4.	Organisms always need energy, but they don't always need nutrients

Subtopic: Energy Flow | Nutrient Cycling |

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Given below is a simplified model of phosphorus cycle in an ecosystem. Select the correct statements:

Statement I:	Rocks are the natural reservoirs where phosphorus is present in the form of phosphates.
Statement II:	Minute amounts of phosphates dissolve in soil solution when rocks are weathered and are absorbed by the roots of the plants.
Statement III:	Herbivores and other animals obtain phosphorus from plants.
Statement IV:	Phosphate solubilising bacteria decompose waste products and dead organisms releasing phosphorus.
Statement V:	Gaseous exchange of phosphorus between organisms and environment is significant.

1.	All except Statement V are correct.
2.	All except Statement I and Statement V are correct.
3.	Only Statement I, Statement II and Statement III are correct.
4.	All Statements are correct.

Subtopic: Nutrient Cycling |

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