- Life Sciences
states that the cell membrane consists of a double layer of phospholipids in association with large protein molecules. Each phospholipid molecule consists of two parts, the 'head' and the 'tail'.
a method of ordering the age of different fossils, relative to each other, without working out...
organelles that only occur in the green parts of plants. They contain the green pigment...
a series of numbers that represents the types and arrangement of the teeth of a mammal.