Which of the following would a microbiologist be surprised to find within a bacterial cell?
(a) plasmids (b) internal membranes (c) a circular chromosome (d) ribosomes.

(b) internal membranes

Explanation:

This is because prokaryotes do not have internal membranes. The other components -- plasmids, circular chromosomes (plasmids), and ribosomes, are all in bacterial cells, however.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.