Rodent infestation and damage signs comprise ?

B. Burrows and nesting materials

What are the three "R's" to remember about waste management?

C. Reform, Rebuild, and Restore

D. Recover, Refine, and Repurpose

Negative values of wildlife comprise ?

A. Damage to crops and property

C. Threat to human life and livestock

Everyday Science · Environment, Weather & Ecology · page 27 of 40

Ecosystem MCQs with Answers

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Ecosystem, Biodiversity & Conservation MCQs (261–270)

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Past paper MCQs in this chapter · See all past papers

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261.
Rodent infestation and damage signs comprise ?
Correct Answer: D. All of these
One-liner
Rodent infestation and damage signs comprise All of these — gnaw marks, droppings, burrows, nesting materials, grease marks, and foul odor.
262.
Which of these equations explains the logistic model?
Correct Answer: B. dN/dt = rN(1 - N/K)
One-liner
The logistic model is explained by the equation dN/dt = rN(1 - N/K), which incorporates carrying capacity (K) to limit exponential growth.
263.
Optimum dissolved oxygen required for carp culture is ?
Correct Answer: C. 6-8 ppm
One-liner
The optimum dissolved oxygen required for carp culture is 6-8 ppm.
264.
What are the three "R's" to remember about waste management?
Correct Answer: A. Reduce, Reuse, and Recycle
One-liner
The three "R's" of waste management are Reduce, Reuse, and Recycle.
265.
Negative values of wildlife comprise ?
Correct Answer: D. All of these
One-liner
Negative values of wildlife comprise All of these — damage to crops/property, transmission of diseases, and threat to human life and livestock.
266.
A trend toward the decrease in the size of plants on the slopes of mountains as altitudes increase is an example of ?
Correct Answer: D. A cline
One-liner
A gradual change in the characteristics of a species across a geographical gradient, such as decreasing plant size with increasing altitude, is called a cline.
267.
Which type of waste is more hazardous to health and environment?
Correct Answer: B. Animal waste
One-liner
Animal waste is more hazardous to health and the environment because it contains harmful pathogens, parasites, and can contaminate water sources.
268.
Past Paper MCQ
Which protected area concerns with protection of biodiversity & geological features with strict rules without human activities?
Correct Answer: B. Strict Natural Reserve
One-liner
A Strict Natural Reserve is a protected area designated for the conservation of biodiversity and geological features, where human activities are strictly prohibited.
269.
Industrial effluents may have toxic synthetic organic compounds as well as heavy metal like _?
Correct Answer: D. All of these
One-liner
Industrial effluents may contain toxic synthetic organic compounds as well as heavy metals like lead, mercury, and cadmium — All of these.
270.
The level of oxygen must not be less than ?
Correct Answer: A. 5 ppm
One-liner
The level of dissolved oxygen in water must not be less than 5 ppm (parts per million) to sustain aquatic life.

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Ecosystem MCQs with Answers

Ecosystem, Biodiversity & Conservation MCQs (261–270)

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