Biology Semester Final

What is the original source of almost all energy in most ecosystems?

• Carbohydrates

• Sunlight

• Water

• ATP

Tags

NGSS.MS-LS1-6

What is not a form of symbiosis?

• Parasatism

• mutualism

• commensalim

• nonalism

The diagram shows the feeding relationships between populations of plants and animals in an area. The arrows point from the organisms being eaten to the organisms that eat them.

Most of the rabbits in this area are killed. If the number of hawks does not change, what could happen to the number of crickets and why? Use only the relationships between the plants and animals shown in the diagram.

• The number of crickets would decrease because fewer rabbits could result in a decrease in the number of individuals in all of the populations of organisms in this diagram.

• The number of crickets could decrease because with fewer rabbits for the hawks to eat, the hawks would eat crickets instead.

• The number of crickets could increase because with fewer rabbits for the hawks to eat, the hawks would eat more frogs, so there would be fewer frogs to eat the crickets.

• The number of crickets would not be affected by the number of rabbits because crickets are not connected by an arrow to rabbits in the diagram.

The diagram shows the feeding relationships between populations of plants and animals in an area. The arrows point from the organisms being eaten to the organisms that eat them.

A new species that eats only foxes becomes part of this food web. Using only the relationships between the plants and animals shown in the diagram, which of the following could happen because of this change?

• The amount of grass and the number of mice, robins, caterpillars, and trees could increase.

• The amount of grass and the number of mice, robins, caterpillars, and trees could decrease.

• The number of robins could increase, and the number of caterpillars could decrease.

• The number of robins could decrease, and the number of caterpillars could increase.

In 1893, a large area of a national forest was home to mountain lions, coyotes, and bobcats as well as about 3,000 deer.

The deer ate grass, and the mountain lions, coyotes, and bobcats ate deer.

Around 1900, hunters began killing large numbers of mountain lions, coyotes, and bobcats. By 1923, there were 100,000 deer in this population.

Using only the relationships between the plants and animals described above, which of the following statements could explain why the population of deer increased so much?

• The number of deer increased because without predators, the deer lived longer and had more offspring that also lived longer.

• The number of deer increased because populations are always increasing.

• The number of deer increased because with fewer mountain lions, coyotes, and bobcats, the deer had more food to eat.

• There is not enough information to tell why the deer population increased.

Organisms that breaks down and absorbs nutrients from dead organisms

• Carnivore

• Herbivore

• Decomposer

• Omnivore

Tags

NGSS.MS-LS2-3

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 20%

• 90%

• 10%

• 5%

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the food web shown, the snail would be considered...

• Primary Consumer

• Tertiary consumer

• Secondary consumer

• Priducer

Tags

NGSS.MS-LS2-3

a relationship between two in which one species, the predator, feeds on the other species, the prey

• Chemosynthesis

• Predation

• Cellular Respiration

• Commensalism

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Non-living factor that affects an ecosystem

• Biotic Factor

• Abiotic Factor

• Biome

• Food Chain

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4