Lesson 16

Plants need carbon dioxide, water, and sunlight

Takes place in the green pigment chlorophyll in the chloroplasts of the leaves.

The light-dependent reactions of photosynthesis release oxygen from the hydrolysis of water.

• Xylem is the name of the tube through which water and minerals move up the tree.

• Xylem actually becomes the wood of the trunk and branches. 

• The water moves through the xylem due to transpiration

• Phloem is the tissue that carries food from the leaves throughout the tree. 

• The veins in leaves contain both xylem and phloem tissue. 

The petiole connects the phloem and xylem in the veins to the branch or trunk of the tree.

• The secondary phloem is part of the bark.

for Lesson 16

Glucose is used in the cells of the plant.

Cellulose is the main substance in the walls of plant cells, helping plants to remain stiff and upright.

Starch is made by plants to store energy for when they need it.

• Plants store proteins for future growth and development.

• Proteins are made up of amino acids

DNA is the genetic material, present in all cells. Plant cells copy all their DNA in chromosomes so that they will have a complete set to give to a new cell during cell division

• ATP is the energy source for chemical processes taking place in plant issues.

• ATP is energy that is transformed from the process.