APES 2.6-7

What is ecological succession?

• A set of environmental conditions within which an organism can best survive

• An organism's ability to adapt to its environment

• A peak community where the organisms are stable

• The process of change in the species structure of an ecological community over time

What stage of ecological succession is being shown?

• Primary succession

• Secondary succession

• Tertiary succession

• Climax community

When a community is stable with little to no change, what level of ecological succession is taking place?

• Primary succession

• Secondary succession

• Tertiary succession

• Climax community

What is the difference between primary and secondary succcession?

• Primary succession already has soil

• Lichen and moss come in for secondary succession

• Secondary succession already has soil

• Climax community is achieved quickly in primary succession

Introduced species can become pests because they;

• Produce only a few young after a long period of gestation.

• Inhabit only niches that have recently become available after the local extinction of another species.

• Can live in many niches, easily adapting to many variables and eating a wide variety of food.

• Have a low genetic variability, enabling them to live in a wide variety of habitats.

• Increase biodiversity because they attract more species to the areas in which they settle.

Individuals living in the zone of intolerance will _____.

• thrive

• reproduce

• die

• play the harmonica

The ​ (a)   the ​ (b)   of an organism, the slower the rate of evolution.

• longer
• lifespan
• shorter

• tail

• teeth

• range of tolerance

• sharper

Living organisms must acquire energy from their environment. Examples of adaptations that help organisms acquire this energy include which of the following?

I. The dark, heat-absorbing coloration of a reptile.

II. The fangs and claws of a lion

III. The light coloration of a peppered moth

• I only

• II only

• I and II only

• II and III only

Which of the following best shows the process of evolution?

• A lizard's color becomes brown as it sits on a log

• A bear goes into hibernation.

• A bear goes into hibernation.

• A population of mosquitoes develops resistance to a pesticide.

Scientists are interested in determining the impact of the construction of a hydroelectric dam on a population of salmon that live downstream of a populated area. They measure the health of the salmon population in its current state, several years after the dam was constructed. Which of the following would be the best to use as a control in this study?

• The health of the salmon population in the river before humans lived in the area

• The health of the salmon population at the apex of the dam’s construction

• ) The health of the salmon population just after the dam’s construction was completed

• The health of the salmon population prior to any dam construction