Tree Physiology

What are the two essential components necessary for photosynthesis?

• Oxygen and Water

• Carbon Dioxide and Water

• Nitrogen and Oxygen

• Carbon Dioxide and Nitrogen

Photosynthesis takes place within cells that contain ______.

• Mitochondria

• Chloroplasts

• Nuclei

• Ribosomes

Which of the following factors affect the rate of transpiration in plants?

• Temperature

• Humidity

• Cuticle thickness

• All of the above.

Water moves into roots by a process called ______.

• Transpiration

• Photosynthesis

• Osmosis

• Evaporation

What is the role of auxins in plant growth?

• Inhibit root growth

• Promote cell division

• Enhance fruit ripening

• Regulate shoot and root growth

The upward orientation of stem growth in response to gravity is known as ____.

• Phototropism

• Geotropism

• Hydrotropism

• Thigmotropism

What is the term used to describe trees with upright forms and strong central leaders?

• Decurrent

• Excurrent

• Lateral

• Rounded

In the CODIT model, which wall is responsible for resisting the outward spread of decay?

• Wall 1

• Wall 2

• Wall 3

• Wall 4

Which wall is considered the strongest barrier against decay in trees?

• Wall 1

• Wall 2

• Wall 3

• Wall 4

The barrier zone in trees is strong chemically but weak structurally because Wall 4 interrupts the structural role of the ________.

• parenchyma rays

• xylem

• phloem

• cambium