6. Which of the following events occurs in DNA replication in prokaryotes? a. Regulatory proteins bind to all of the nucleotides on the DNA molecule.
b. Enzymes "unzip" the DNA molecule by breaking ionic bonds between base pairs.
c. Replication starts from a single point and proceeds in two directions until the entire
chromosome is copied.
d. Replication starts from multiple points and proceeds in two directions until the entire
chromosome is copied.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

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.

condenser is used to focus in the light microscope.