In an pond ecosystem the _____ is always greater than the _____ .

(a) number of primary producers . . . number of secondary consumers

(b) biomass of secondary consumers . . . biomass of primary consumer

(c) assimilation efficiency of primary consumers . . . assimilation efficiency of secondary consumers

(d) biomass of primary producers . . . biomass of primary consumers

#Question id: 3008

#Part-A Aptitude & General Biotechnology

The structures present in the hay infusions used in experiments on spontaneous generation that made them difficult to sterilize are

#Question id: 14108

#Part-B Specialized Branches in Biotechnology

#Question id: 10570

#Part-B Specialized Branches in Biotechnology

The diffusion coefficient (Ds ) is a characteristic of the substance

a) diffusion in liquid is much faster than diffusion in air

b) larger molecules have smaller diffusion coefficients

c) diffusion in air is much faster than diffusion in a liquid

d) Larger molecules have larger diffusion coefficient

Which of the following combination is correct?

#Question id: 4738

#Part-A Aptitude & General Biotechnology

Red kernel color in wheat results from the presence of at least one dominant allele of each of two independently segregating genes . Kernels on rr bb plants are white, and the genotypes R— bb and rr B— result in brown kernel color. Suppose that plants of a variety that is true breeding for red kernels are crossed with plants true breeding for white kernels produced F1 were allowed to selfing .what are F2 phenotype ratio ?

#Question id: 5831

#Part-B Specialized Branches in Biotechnology

Mutations can be caused by which of the following?