Ecology Quiz Review

What would best explain the decrease in primary producers?

• an increase in solar energy
• a decrease in O2 levels in the H2O
• a decrease in the population of tertiary consumers
• an increase in the population of primary consumers

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What would likely be the result if a pesticide is used to reduce the # of harvester ants?

• an increase in snakes & a decrease in hawks
• a decrease in snakes & an increase in hawks
• a decrease in mesquite bushes & an icnrease in horned lizards
• an increase in mesquite bushes & a decrease in horned lizards

The oak savanna ecosystem is dependent on wildfires & controlled burnings to manage the growth of invasive & nonnative shrubs and trees and to help maintain the native semi-open ecosystem.  Which statement BEST describes the impact invasive plant species could have if not maintained by fires?

• they could decrease the populations of native species
• they could decrease the amount of O2 available for the native animals
• they could increase the amount of food available to native plants & animals
• they could increase the amount of N in the soil that is toxic to the native plants

Which of these factors is most important for reestablishing plants & trees on an abandoned farm?

• sunlight & CO2
• O2 and CO2
• glucose & N
• ATP and xylem

A decrease in the frog population would MOST likely lead to an increase in the population of which organisms?

• owl
• grass
• snake
• grasshopper

How would a drought in the Southern Plains most likely affect the quail population?

• an increase in the quail population due to a decrease in the rabbit population
• a decrease in the quail population due to a decrease in nesting cover
• an increse in the quail population due to a decrese in the mouse population
• all of these

To reduce erosion in an area, an exotic fast-growing vine is introduced into the area without any growth control.  How will the new plant most likely have an effect on the ecosystem?

• The vine will provide protection for the native plants
• The vine will provide more CO2 to all of the other species
• The vine will compete with native plants for resources
• The vine will compete with native animals for food, water, and minerals

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-5

In Southern California, the intentional reduction of the coyote population has led to a decrease in the types of song birds in that area.  Which is a likely explanation why song bird populations have decreased?

• Coyotes feed on animals that prey on song birds.
• Coyotes protect nests built by bird songs.
• Song birds are killed by diseases carried by coyotes.
• Song birds feed on animal matter killed by coyotes.

A condition that occurs when two or more organisms compete for the same resources or food within an ecological community

• Population
• Competition
• Ecosystem
• Community

Tags

NGSS.MS-LS2-4

What is the best explanation for what the arrows in a food chain represent?

• The arrows demonstrate in which direction the animal or plant is moving

• The arrows demonstrate the order in which a plant or animal consumes food

• The arrows demonstrate how much each animal eats

• The arrows demonstrate the flow of energy through the food chain