A

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?

• Whip Scorpion

• Wind Scorpion

• Daddy long legs

• Scorpion

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta

• Order Amblygygi

• Order Araneae

• Order Scorpiones

When using a dichotomous key to identify organisms, what do we look at?

• physical features

• weather patterns

• environment

• diet

Tags

NGSS.MS-LS4-2

What is the difference between biotic and abiotic?

• Biotic are non-living things

• Abiotic are living organisms

• Biotic is life,
  Abiotic is non-living

• Biotic is non-living, Abiotic is living

Tags

NGSS.MS-LS2-3

In an ecosystem, which type of animal would best be described as a secondary consumer?

• Carnivore

• Herbivore

• Omnivore

• Decomposer

• Producer

Tags

NGSS.MS-LS2-3

Complete the statement. The more diverse an ecosystem is ______

• the more threatened its populations are

• the more similar the species will be

• the more stable it is

• the few varieties of species are present

Tags

NGSS.MS-LS2-5

in the aquatic food web below, which two organisms have a predator-prey relationship?

• Shad and sturgeons

• Sturgeons and blue crabs

• Blue crabs and rangia clams

• Copepods and amphipods

Tags

NGSS.MS-LS2-2

Refer to the food web. If the grasses in each ecosystem are attacked and killed by a disease, which ecosystem will most likely survive?

• The prairie ecosystem, because few organisms eat grass.

• The tundra ecosystem, because there is a variety of producers.

• The prairie ecosystem, because there a fewer top predators.

• The tundra ecosystem, because it has more herbivores.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?

• A. A variety of plant and animal species allows for more survivors of a natural disaster.

• B. Having more species in an ecosystem allows the human population to increase in size.

• C. Low biodiversity reduces the competition for resources, which helps native species survive.

• D. Few species in the ecosystem reduces the likelihood that disease spreads through the ecosystem.

Tags

NGSS.MS-LS2-5

Aluminum is refined from bauxite, which is found in the ground under rainforests. Humans must destroy this habitat to mine the bauxite and make aluminum. This type of habitat destruction will most likely result in ---

• an increase in rainfall

• an increase in number of species

• a decrease in biodiversity

• a decrease in cloud formation

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5