As the pea seeds respire, the level of the 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 the liquid change

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