Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms?A. mechanical isolation
B. reduced hybrid fertility
C. habitat isolation
D. gametic isolation
E. hybrid breakdown

C. habitat isolation

Explanation:

When individuals of a species can not interbreed due to their presence in different geographical regions, it is called habitat isolation. It is an example of prezygotic reproductive isolation that does not allow mating between the individuals due to their presence in distant habitats. Various breeds of dogs may interbreed among themselves. However, these breeds are kept in separate habitats to prevent mating between them. This represents an example of habitat isolation.

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.

easy

explanation: