What would happen without excretory systems in humans? a) wastes would build up in blood and damage the body. b) blood would not circulate through the body. c) oxygen would not enter the blood stream. eliminate d) nutrients would not be absorbed.

The answer is A. Wastes would build up in blood and damage the body

A is the answer to this question. Hope this helps!

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.

not sure if this is what you'r looking for eubacteria and archaebacteria