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[A] : Biological indicators enhance use...

[A] : Biological indicators enhance usefulness of ecology to mankind .
[R] : Their knowledge is useful in protection and reclamation along coasts , water purification nature conservation etc .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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Phase space diagrams are useful tools in analysing all kond of dynamical problems. Theya re especially useful in studying the changes in motion as initial position and momentum are changed. Here we consider some simple dynamical system in one-dimelnsion. for such systeam, phase space is a plane in which position is plotted along horizontal axis and momentum is plotted along vertical axis. The phase space diagram is x(t) vs. p(t) curve in this plane. The arrow on the curve indicates the time flow. for example, the phase space diagram for a particle moving with constant velocity is a straight line as shown in the figure. We use the sign convention in which position or momentum. upwards (or to right) is positive and downwards (or to left) is negative. Consider the spring-mass system, with mass submerged in water, as shown in the figur, the phase diagram for one cycle of this system is :

TRUEMEN BIOLOGY ENGLISH-Ecology -ASSERTION AND REASON
  1. [A] : Total biomass on land is much more than that in water . [R] :...

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  2. [A] : Epiphytes differs from Lianas in that they are not rooted in th...

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  3. [A] : Biological indicators enhance usefulness of ecology to mankind ...

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  4. [A] : Depletion of ozone layer results in human disease like cancer ....

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  5. [A] : UV irradiation to disinfect polluted waters is not generally re...

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  6. [A] : A species is an interbreeding population which is reproductively...

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  7. [A] : Plants having capacity to withstand wide range of temperature t...

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  8. [A] : Each food-level in an ecosystem is called trophic level . [R]...

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  9. [A] : Biomonitoring is reliable for determing the pollutants in air ,...

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  10. Assertion (A) : Tropical rain forests are disappearing fast from devel...

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  11. [A] : Leaf butterfly & stick insect show mimicry to dodge their enemi...

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  12. [A] : In a food chain , membrane of successive higher levels are fewer...

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  13. Assertion (A) : Methane component of greenhouse gases contributing to ...

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  14. Assertion: Suspended particulate matter(SPM) is an important pollutant...

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  15. Assertion : Age sex structure of human population in countries like Fr...

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  16. Assertion (A) : Presently, the global atmosphere is warming up. Reas...

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  17. [A] : Ozone depletion at the south pole will threats world's fisheries...

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  18. [A] : Inquilines can not survive without human care . [R] : Cultige...

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  19. [A] : Problems of ecological environment arise from over population....

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  20. [A] : Social forestry programme is grows trees for fuel , fodder & fru...

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