FREE ISA Tree Biology and Physiology Questions and Answers

Question 1

Which of the following accurately describes the primary function of phloem tissue in a tree?

Accepted Answer

Transporting sugars produced during photosynthesis from the leaves to other parts of the tree.

Answer

Transporting water and minerals from the roots to the leaves.

Answer

Providing structural support to the trunk and branches.

Answer

Forming a protective outer layer against pests and diseases.

Question 2

An arborist observes a tree with a tall, dominant central leader and suppressed lateral branch growth. This growth pattern is a classic example of:

Accepted Answer

Apical dominance

Answer

Hydraulic lift

Answer

Negative phototropism

Answer

Compartmentalization

Question 3

The process by which a tree releases water vapor into the atmosphere through small pores (stomata) in its leaves is known as:

Accepted Answer

Transpiration

Answer

Respiration

Answer

Photosynthesis

Answer

Translocation

Question 4

According to the CODIT model (Compartmentalization of Decay in Trees), which 'wall' is considered the strongest and is formed by the cambium after an injury occurs, separating new wood from the damaged tissue?

Accepted Answer

Wall 4

Answer

Wall 1

Answer

Wall 2

Answer

Wall 3

Question 5

A client is concerned about a large, mature oak tree in their yard after a recent period of soil compaction from construction equipment. Why is oxygen in the soil crucial for the health of the tree's root system?

Accepted Answer

Oxygen is necessary for the process of root respiration, which releases energy for growth and nutrient uptake.

Answer

Oxygen is required for the roots to absorb water through osmosis.

Answer

Roots release oxygen into the soil to deter harmful pathogens.

Answer

Soil oxygen directly fuels the process of photosynthesis within the root cells.

Question 6

Photosynthesis is the fundamental process that fuels a tree's growth. Which of the following are the three essential inputs required for this process to occur?

Accepted Answer

Sunlight, carbon dioxide, and water

Answer

Oxygen, water, and soil minerals

Answer

Nitrogen, chlorophyll, and sugar

Answer

Carbon dioxide, oxygen, and sunlight