What are flagella and cilia? A. Extensions of the plasma membrane that help things cross the membrane
B. Extensions of the plasma membrane that help the cell move or help move things past
the cell
C. Membrane proteins that help things cross the membrane
D. Membrane proteins that help the cell move or help move things past the cell

Cilia and flagella are tube-like appendages which allow for motion in eukaryotic cells. ... The motion of the cilia or flagellum moves the liquid outside the cell and if the cell is not anchored, it can "swim." A commonly recognized example is the "tail" on a sperm cell, which is actually a flagellum.

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.