If we were to compare the cells in the plant leaves to the cells in the plant roots, we would expect the leaf cells to contain many more

The model illustrates a process by which a substance is taken up by a cell

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Number and variety of living organisms includes genetic, species, and ecological types