Tree Growth and Functions

What part of the tree carries water and nutrients from roots to leaves?

• Phloem

• Cambium

• Xylem

• Heartwood

Answer explanation

The xylem is the part of the tree responsible for transporting water and nutrients from the roots to the leaves, making it essential for the tree's growth and health.

Which part of a tree is responsible for producing new cells for growth?

• Sapwood

• Cambium

• Outer bark

• Crown

Answer explanation

The cambium is a layer of tissue in a tree that is responsible for producing new cells, allowing for growth in diameter. It lies between the sapwood and the inner bark, making it crucial for the tree's development.

Tags

NGSS.MS-LS1-5

What is the primary function of the phloem?

• Support structure

• Photosynthesis

• Water transport

• Sugar transport

Answer explanation

The primary function of the phloem is sugar transport. It carries the products of photosynthesis, mainly sugars, from the leaves to other parts of the plant, supporting growth and energy needs.

The rough, protective layer on the outside of a tree is called:

• A) Cambium

• B) Inner bark

• C) Outer bark

• D) Sapwood

Answer explanation

The outer bark is the rough, protective layer of a tree, serving as a barrier against environmental threats. The cambium is responsible for growth, inner bark transports nutrients, and sapwood is involved in water transport.

Which type of root system spreads horizontally near the soil surface?

• A) Taproot

• B) Fibrous

• C) Woody root

• D) Root hairs

Answer explanation

The fibrous root system consists of many thin roots that spread horizontally near the soil surface, allowing for better absorption of water and nutrients. In contrast, a taproot grows deeper into the soil.

A seedtree cut relies on:

• Controlled burns

• All trees being removed

• Natural seed dispersal from selected trees

• Mechanical planting

Answer explanation

A seedtree cut relies on natural seed dispersal from selected trees, allowing new growth while preserving some trees to provide seeds for regeneration, rather than removing all trees or relying on mechanical planting.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which method is a planned fire to reduce wildfire risk?

• Clearcutting

• Controlled burn

• Shelterwood

• Thinning

Answer explanation

A controlled burn is a planned fire used to reduce excess vegetation, thereby lowering the risk of uncontrolled wildfires. It helps manage forest health and fire behavior, making it the correct choice for wildfire risk reduction.

What is one purpose of thinning a forest?

• Increase wildfires

• Eliminate all small trees

• Improve wildlife habitat

• Remove canopy

Answer explanation

Thinning a forest helps improve wildlife habitat by allowing more sunlight to reach the forest floor, promoting the growth of underbrush and diverse plant species that support various wildlife.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which part of a tree helps it store nutrients and anchor it to the ground?

• Leaves

• Trunk

• Roots

• Crown

Answer explanation

The roots of a tree are essential for storing nutrients and anchoring it to the ground. They absorb water and minerals from the soil, providing stability and nourishment for the tree's growth.

Tags

NGSS.4-LS1-1

Which forest practice removes all trees at once?

• Thinning

• Clearcut

• Improvement cut

• Shelterwood

Answer explanation

The clearcut practice involves removing all trees in a designated area at once, making it distinct from thinning, improvement cuts, and shelterwood methods, which retain some trees for various ecological or economic reasons.