Populations and the Environment Answers

Which of the following statements are observations about the photo on the right? Check all that apply.

A forest is rapidly growing new plant life: ✔ positiveX negativeboth

A forest is rapidly growing new plant life: positivenegativeboth

Humans remove wolves from a national park to protect surrounding homes: positivenegativeboth

A dam is built in the middle of a river ecosystem to supply water to a nearby town:

Identify the interactions as positive, negative, or both.A mudslide wipes out the side of a thriving hill:

Identify whether each of the following is a biotic or abiotic factor.Bear:

A recent forest fire has swept through the forest, killing many of the smaller organisms such as the hare, deer, and rodent populations that are prey for the larger organisms such as bobcats, wolves, and mountain lions. How would this affect the populations in the forest ecosystem? Check all that apply.

Identify whether each of the following is a biotic or abiotic factor.Bear: ✔ bioticabiotic

An organism’s niche is determined by its , which is it’s physical environment.

, inherited traits that increase an organisms chance of survival, also determine an organism’s niche.

Identify the interactions as positive, negative, or both.A mudslide wipes out the side of a thriving hill: positive✔ negativeX both

A dam is built in the middle of a river ecosystem to supply water to a nearby town: positivenegativeboth

A recent forest fire has swept through the forest, killing many of the smaller organisms such as the hare, deer, and rodent populations that are prey for the larger organisms such as bobcats, wolves, and mountain lions. How would this affect the populations in the forest ecosystem? Check all that apply.

Rock:

Rock: bioticabiotic

Dead log:

Dead log: bioticabiotic

Grass:

Grass: bioticabiotic