3. Rotifers are found on every continent except for which one? Australia
Africa
Antarctica
Asia

Antarctica

Explanation:

Rotifers are multicellular organisms of various shapes. Their length is from 0.1 to 0.5 mm. The process of feeding in rotators is very interesting due to the presence of the so-called "hunting apparatus".

The device consists of cilia, by the movement of which the rotators create a stream of water and thus attract the microorganisms they feed on.

the cell theory states that all living things including animals, as well as plants, are made of cells.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.