Which invasive weed is a major cause of biodiversity loss worldwide? What impact does this bring about to the ecosystem?

Pollutants and pollution are a major cause for biodiversity loss - Justify

What does increased BOD and COD bring about?

What are the major causes of species losses in a geographical region?

What is deficiency loop? Which causes this? Explain about the cause with its types.

What is meant by invasive species? Explain its impact on the ecosystem.

Which of the following is not a cause for loss of biodiversity ? (a) Destruction of habitat (b) Invasion of alien species (c) Keeping animals in zoological parks (d) Over-exploitation of natural resources

The term ''the evil quartet'' is related with four major causes of (a) Forest loss (b) Population explosion (c) Air pollution (d) Biodiversity losses

For scattering by an 'inverse square field' (such as that produced by a charged nucleus in Rutherford's model) the relation between impact parameter b and the scattering angle theta is given by b (Ze^2 cot (theta/2))/(4 pi epsi_0 ((mv^2)/(2))) a. What is the scattering angle for b =0? b. For a given impact parameter h, does the angle of deflection increase or decrease with increasing energy? c .What is the impact parameter at which the scattering angle is 90^@ for Z = 79 and initial energy of 10 MeV? d. Why is it that the mass of the nucleus does not enter the formula above but the charge does? e. For a given energy of the projectile, does the scattering angle increase or decrease with decrease in impact parameter?

Answer the following questions, which help you to understand the difference between Thomson's model and Rutherford's model better. a. Is the average angle of deflection of a-particles by a thin gold foil predicted by Thomson's model much less, about the same, or much greater than that predicted by Rutherford's model? b. Is the probability of backward scattering (i.e., scattering of a-particles at angles greater than 90^@ ) predicted by Thomson's model much less, about the same, or much greater than that predicted by Rutherford's model? c. Keeping other factors fixed, it is found experimentally that for small thickness t, the number of alpha - particles scattered at moderate angles is proportional to t.What clue does this linear dependence on t provide? d. In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of alpha particles by a thin foil?

The impact of loss of biodiversity includes (a) decline in plant production (b) lowered resistance to environmental perturbations (c) increased variability in ecosystem processes like plant productivity, water use, pest and disease cycles (d) all of these