Pith Characteristics and Leaf Arrangements

Billy Beck from Iowa State University Extension explains five features for identifying trees using twigs. The video covers twig characteristics such as leaf arrangement, leaf scars, and pith. It provides tips for identifying trees in different seasons and encourages using an online interactive tree identification key. The video concludes with a mention of bark as another identification feature.

What is the primary purpose of the video series introduced by Billy Beck?

• To explain features for identifying trees

• To teach about tree planting techniques

• To promote Iowa State University

• To discuss the history of forestry

Which of the following is NOT a primary leaf arrangement on a twig?

• Alternate

• Opposite

• Whorled

• Clustered

What mnemonic is suggested to remember species with opposite leaf arrangement?

• TWIG, LEAF, BUD

• OAK, MAPLE, PINE

• LEAF, TREE, BARK

• MAD, CAP, BUCK

What feature becomes visible at each node after leaves drop in the fall?

• Root structure

• Leaf scar

• Bark pattern

• Twig color

Which shape is NOT mentioned as a possible shape for leaf scars?

• Heart-shaped

• Circular

• Square

• V-shaped

What do bundle scars represent?

• Root patterns

• Bark texture

• Old leaf growth

• Cross-sections of former sap conduction channels

What tool is recommended to examine bundle scars closely?

• Binoculars

• Microscope

• 10x hand lens

• Magnifying glass

Where is the pith located in a twig?

• On the surface

• At the twig's core

• In the roots

• In the leaves

Which pith characteristic is the most common?

• Hollow

• Diaphragmed

• Chambered

• Continuous

What is the purpose of slicing twigs lengthwise?

• To view the bark texture

• To examine leaf scars

• To observe longitudinal pith characteristics

• To identify root patterns