Give three hypotheses for explaining why tropics show greatest levels of species richness.

Which of the following statements regarding biodiversity hot spots are incorrect? i) High endemism ii) High levels of species richness iii) Total number is 34 in the world iv) Five of these occur in India v) High alien species invasions vi) Cover less than 2% of the earth's land area, but if properly conserved, they can reduce extinctions by about 30%

Consider the following statements (A-D) each with one or two blanks. A) Bears go into (1) during winter to (2) cold weather A conical age pyramid with a broad base represents (3) human population A wasp pollinating a fig flower is an example of D)An area with high levels of species richness is known as (5) Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?

Why does the first element in a group show anomalous behaviour. Give a reason

Why does the first elements in a group show anomalous behaviour. Give a reason.

Study the following statements I) The simple count of number of species in an area shows the alpha diversity II) Beta diversity means the unique species in an ecosystem in comparison to other III) The more is the species richness the more is the evenness always. In the above statements

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be

Figure shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?

Figure. gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least ? Give the sign of average velocity for each interval.