Describe how the conditions under which rocks form affect the physical stability of rocks.

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes