Susan Is Studying Tree Growth in Two Regions That Have

question 40

Multiple Choice

Susan is studying tree growth in two regions that have been logged. One site was logged 10 years previously, and the second was logged two years prior to her study. In each of these study areas, she counts the number and types of trees that have a diameter greater than 5 cm. At the first site, she finds 10 scotch pines, 20 oak trees, and 5 dogwoods. At the second site she records 15 oak trees and 10 maple trees. Her study includes _____ organisms, _____ populations, and _____ communities.

• A) 60; 3; 2
• B) 3; 2; 60
• C) 2; 3; 60
• D) 60; 2; 3

---

Definitions:

Uncoupling

The process of separating two components that were joined or connected, commonly used in the context of railcars or trailers.

Trailer Parking Brakes

A braking system designed specifically for trailers to prevent them from rolling when parked or during hitching and unhitching operations.

5th Wheel Locks

Mechanical devices designed to secure the fifth wheel coupling on a tractor-trailer, preventing unauthorized detachment of the trailer.

Bowed Upper Coupler

A condition in semi-trailers where the front upper plate, which connects to the tractor, is bent or curved, potentially affecting connection and safety.