CATS - Certified Arborist Tree Service of Albuquerque Tree Biology and Physiology Questions and Answers

Question 1

Which of the following describes the primary physiological functions of stomata on a tree's leaves?

Accepted Answer

To regulate gas exchange and control water loss through transpiration.

Answer

To absorb water and nutrients from the atmosphere.

Answer

To anchor the leaf to the stem and transport sugars.

Answer

To produce chlorophyll for photosynthesis.

Question 2

A certified arborist is explaining to a client how trees move sugars from the leaves to other parts of the tree, like the roots and fruit. In this process, the mature leaves are considered a 'source.' What is the corresponding term for the roots, fruit, or growing tips that receive these sugars?

Accepted Answer

A sink

Answer

A conduit

Answer

A meristem

Answer

A reservoir

Question 3

Which of the following tree tissues is a lateral meristem responsible for secondary growth, which results in the thickening of the trunk and branches?

Accepted Answer

Cambium

Answer

Xylem

Answer

Phloem

Answer

Cortex

Question 4

When a tree is wounded, it responds by forming chemical and physical barriers to resist the spread of decay. This defensive process, described by Dr. Alex Shigo, is known as:

Accepted Answer

Compartmentalization of Decay in Trees (CODIT)

Answer

Hydraulic lift

Answer

Photosynthetic prioritization

Answer

Apical dominance assertion

Question 5

A tree's total energy balance depends on the relationship between photosynthesis and respiration. Which statement accurately contrasts these two processes?

Accepted Answer

Photosynthesis stores energy by producing sugars, while respiration releases energy by consuming sugars.

Answer

Photosynthesis occurs only in the dark, while respiration occurs only in the light.

Answer

Both processes produce oxygen and consume carbon dioxide.

Answer

Photosynthesis happens in the roots, while respiration happens in the leaves.

Question 6

Which of the following best describes the symbiotic relationship known as mycorrhizae?

Accepted Answer

A mutually beneficial association between fungi and tree roots where the fungus helps the tree absorb water and nutrients in exchange for sugars.

Answer

A parasitic fungus that attacks and consumes tree roots, leading to decline.

Answer

A type of bacteria that lives on leaves and helps protect the tree from airborne pathogens.

Answer

An insect that lives in the bark of a tree and helps ward off wood-boring pests.