How does the alternation of generation found in green alga work?

The sporophyte produces spores (hence the name), by meiosis. These develop into a gametophyte. Both the spores and the resulting gametophyte are haploid, meaning they have half as many chromosomes. Later, the mature gametophyte produces male or female gametes (or both) by mitosis.

Explanation:

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.

haploid cells;