Which prefix would be added to the word biology to change its meaning to the study of the smallest living things?

The answer would be Micro. Because Micro in science means "Extremely Small".

SO it would be Micro.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic