Leaves question, transpiration 10pts?

Question

1 what in leaves causes the different coors on your chromatography paper and why.

2. what parts of a plant are used to move water to thehighest parts of a tree?

which force, adhesion or cohesion causes water to stuick to the sides of the chromatograpy paper?

what parts of the plant is responsible for controlling transpiration?

Answer 1

Hi Tien,

1. The substances in leaves that cause the different colors on your paper chromatography (pc) are Neoxanthin, Vidaxanthin, Lutein, Chlorophyll A, Chlorophyll B, Phaeophytin, and Carotin (see link #2 below).  They are different colors because they reflect different ranges of the light spectrum.

2. The parts of a plant that are involved with moving water to the highest parts of a tree are: the roots (which absorb water, along with nutrients, from the soil); the xylem or sapwood (which is the layer in the trunk and stems of a tree that move the water up the column of the tree and out to the leaves); the veins of the leaves (which transport water to the cells of the leaves); and the leaves' stomata [singular = stoma] (which release water vapor to create the necessary water pressure variance that allows for the water to rise up in the tree's trunk and stems.  This is the transpiration stream... see Link #3, below.).

Your unnumbered questions...

Adhesion is what is causing water to stick to the pc.

The part of the plant that is responsible for controlling transpiration is the stoma (plural = stomata).  With its two guard cells that open and close the stoma's pore, the stoma controls the release of water vapor that reduces the water pressure at the top of the tree so that water will be absorbed up through the tree's trunk and stems.

I hope this helps.

Hiking Tony

Answer 2

1.chrolophyl

2.the xylem vessels

3.adhesion.

4.leaves