A change in the number of single chromosomes without a change in the overall number genes is called and the duplication of a whole genome is called .

A change in the number of single chromosomes without a change in the overall number of genes is called "Dysploidy" and the duplication of a whole genome is called "Polyploidy"

Explanation:

Dysploidy is the change in the chromosome base number produced by chromosomal rearrangements that occurs without loss of genetic information. On the other hand, polyploidy refers to the condition of having more than two complete sets of chromosomes

a.) a destruction fo cells by viral reproduction

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.