FREE Certified Arborist Identification and Selection Questions and Answers

Question 1

What is the term for a group within a species that naturally breeds to a feature that sets them apart from other members of the species?

Accepted Answer

Variety

Answer

A variety (often denoted by 'var.' in botanical names) is a naturally occurring subdivision within a species that possesses distinct characteristics. These traits are stable and heritable, allowing the group to breed true from seed. Unlike cultivars, varieties arise naturally in the wild without human intervention.

Question 2

What factor determines a tree's value most in the CTLA trunk formula method?

Accepted Answer

Size

Answer

In the CTLA (Council of Tree and Landscape Appraisers) trunk formula method, the tree's size, specifically its trunk diameter, is the most significant factor in establishing its base value. This base value is then adjusted by other factors like species, condition, and location. A larger, more mature tree generally has a higher initial monetary value.

Question 3

What is the name of a variety that requires human care and cultivation to maintain a specific trait?

Accepted Answer

Cultivar

Answer

A cultivar (short for 'cultivated variety,' often denoted by 'cv.' or single quotes) is a plant group within a species that has been selected and maintained by humans for specific desirable traits. These traits are not typically found in wild populations and require human intervention, such as propagation through cuttings or grafting, to preserve them. Cultivars do not breed true from seed.

Question 4

Maple, ash, dogwood, and horse chestnut trees primarily exhibit what type of leaf arrangement?

Accepted Answer

Opposite

Answer

Maple, ash, dogwood, and horse chestnut trees are classic examples of trees that exhibit an opposite leaf arrangement. This means that two leaves emerge from the stem directly across from each other at each node. This characteristic is a crucial identification feature for these and other tree species.

Question 5

Which color do the majority of newly planted roots have?

Accepted Answer

White

Answer

The majority of newly planted, healthy, and actively growing roots are typically white or light-colored. This indicates that they are young, succulent, and efficiently absorbing water and nutrients. Brown or black roots often suggest damage, disease, or decay.

Certified Arborist Test Practice Test

Certified Arborist Test Practice Test

FREE Certified Arborist Identification and Selection Questions and Answers