Lesson 16

Lesson 16

“I love trees. I think I shall never see a poem as lovely as a tree.” – Wanjira Mathai, chair, Wangari Maathai Foundation, quoting U.S. poet Joyce Kilmer

Photosynthesis:

Plants need carbon dioxide, water, and sunlight

Photosynthesis:

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

In the thylakoid membrane, chlorophyll absorbs energy from sunlight

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

Multiple Choice

The correct equation for photosynthesis is...

• carbon dioxide + oxygen -> glucose + water

• Oxygen + water -> glucose + carbon dioxide

• glucose + water -> carbon dioxide + oxygen

• carbon dioxide + water -> glucose + oxygen

Multiple Choice

Where do the light reactions happen?

• mitochondria membrane

• thylakoid membrane

• stroma

• central vacuole

We have learned that:

• 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

Multiple Choice

Recall the main function of a xylem cell.

• To transport nutrients (mainly sucrose) to different parts of a plant.

• To make energy for the plant via photosynthesis.

• To transport carbon dioxide to the leaves for photosynthessis.

• To transport water to different parts of plant.

From Lesson 15

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

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

Multiple Choice

#8 - Cell tissue that makes up part of each vein that transports glucose throughout the plant

• Epidermal cells

• Guard cells

• Phloem cells

• Xylem cells

Now the glucose can travel throughout the tree.

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

Multiple Choice

thin stalk that connects the blade of the leaf to the plant's stem

• blade

• cuticle

• petiole

• epidermis

The vascular cambium makes secondary phloem as the tree grows.

• The secondary phloem is part of the bark.

Multiple Choice

Cambium, xylem, & phloem compose a plants ___ tissue.

• nonvascular

• vascular

• green

• root

Open Ended

New Vocabulary

for Lesson 16

All carbohydrates are turned to glucose  in the body and are used as energy.

Glucose is used in the cells of the plant.

Multiple Choice

What is the function of a carbohydrate?

• Stores energy

• Movement

• Stores genetic information

• Speeds up reactions

Cellulose is used for energy storage in plants. 

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

Starch is another storage location for glucose.

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

Multiple Choice

In plants the glucose produced in photosynthesis gets stored as which molecule?

• Starch

• Glycogen

• Lipids

• Protein

Multiple Choice

The plant cell wall is made up of

• chitin

• peptidoglycan

• cellulose

• glycogen

Proteins

• Plants store proteins for future growth and development.

• Proteins are made up of amino acids

Multiple Choice

Amino acids are joined together in order to form

• DNA

• ribosomes

• proteins

• RNA

DNA is located in the nucleus of cells

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

Multiple Choice

The DNA of a cell is found in the __________.

• mitochondria

• lysosome

• nucleus

• vacuole

Phosphorus (P) is essential for production of ATP.

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

Multiple Choice

What does the chemical symbol "P" stand for?

• Phosphorus

• Potassium

• Nitrogen

• Ammonia NH3

Multiple Choice

How is ATP used? It is used as

• The building block of proteins

• An energy source for diffusion

• The building block of DNA and RNA molecules

• An energy source for cell processes

Cellular respiration converts O2 and C6H12O6 into H20, CO2, and ATP.

• ATP is energy that is transformed from the process.

Multiple Choice

Which of the following is produced during the process of cellular respiration?

• carbon dioxide & ATP

• sodium chloride & oxygen

• oxygen & hydrochloric acid

• sugar & lipids

Poll

How are you feeling today?