Name the structural unit of compact bone.

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae