When Mendel crossed the pollen from a plant with green pods with a plant with yellow seed pods, all of the offspring had green seed pods. This told him that green seed pods were dominant over yellow seed pods.

True

Explanation:

Let the allele for green color of pods be G

and the allele for yellow color of pods be g

Phenotype of true breeding parent with green colored seeds is GG

Phenotype of true breeding parent with yellow colored seeds is gg

In F1 cross

GG mates with gg

Genotype of offspring - Gg

Phenotype of offspring - Green seed

Since the offspring has both the allele for green and yellow seeds color but yet only green is expressed. This indicate that green allele dominated the expression of yellow allele thus, it can be concluded that green seed pods were dominant over yellow seed pods.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.