Which evidence supports the cohesion-tension theory for the movement of water in flowering plants? 1 When the rate of transpiration of a tree is at its maximum, the diameter of the trunk is at its minimum. 2 When a plant shoot is removed close to the base of the stem, sap leaks out from the cut. 3 Evaporation of water from a porous pot can exert a force that draws water up a glass tube attached underneath the pot. 4 Droplets of water form at the edge of leaves of plants of plants growing in conditions of soil with high water content and air with high humidity.

Phloem sap is transported from sources to sinks in phloem sieve tubes. Each sieve tube is constructed from phloem sie…

Which descriptions apply to phloem sieve tube elements and to xylem vessel elements? 1 no cytoplasm 2 no end walls 3…

Some of the parts of a plant root involved in water transport are listed. 1 Casparian strip 2 cell walls of cortex c…

What are the products when a DNA molecule replicates?

Which row correctly describes the heart during atrial systole?

The table shows the results used to draw an oxygen dissociation curve for adult haemoglobin. partial pressure of oxy…