An extensive study was conducted on identical twins who were separated at birth. Among other things, the study showed that the individual from each pair who received better nutrition during childhood tended to be taller. This can best be described as an example of how:

a. mutation alters genotype.
b. mutation alters phenotype.
c. environment alters genotype.
d. environment alters phenotype.
e. multiple alleles having an effect on phenotype.

d. environment alters phenotype.

Explanation:

Phenotype refers to the physical characteristics of an organisms such as height, weight, color etc.

Genotype is the genetic composition of an organism.

The phenotype is usually as a result of the environment having an influence on the genotype.

In this case, the other twin is exposed to an environmental condition which is better nutrition. This better nutrition makes the twin taller. Tallness is a phenotypic trait.

This simply means environment altered the phenotype.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles