An engineer measures the energy consumed by an appliance and compares it with the useful energy put out by the appliance. Dividing the energy output by the energy input
results in a value of 24%. Which of these has the engineer measured?
A. Energy crisis
C. Energy conservation
D. Energy efficiency

d energy efficiency

Explanation:

Because none of the others would make sense and I got it right

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

explanation:

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.