Category 5

Which type of succession takes the longest to actually get to a climax community because it starts with bare rock. This type of succession usually happens after a volcano eruption or new island formation (no soil).

• Primary succession

• Secondary succesion

• neither

Answer explanation

In primary succession you start with bare rock. There are no nutrients or soil for plants to grow in. Pioneer species such as fungi and lichens will begin to break down the rock and create soil for plants to grow in.

In secondary succession you already start with soil so it takes less time for communities to form. This happens after forest fires.

Energy pyramids depict the energy transferred between trophic levels. Only 10% of the energy is transferred to the next level. If the producers at the bottom of the pyramid have 100,000 kcal. How much energy will the secondary consumers get?

• 100,000 kcal

• 10,000 kcal

• 1,000 kcal

• 100 kcal

Answer explanation

Remember that 10% gets transferred to the next level. So a rabbit gets only 10% of the energy from the plants it eats, the rest is lost as heat.

When doing the math, taking 10% away is taking a zero away from the big number. So primary consumers get 10,000 kcal and secondary consumers get 1,000 kcal. Tertiary consumers get 100 kcal.

Tags

NGSS.MS-LS2-3

Symbiosis explains relationships between species. Which of the following describes mutualism?

• one organism is the predator and one is the prey

• one organism benefits and one doesn't care

• one organism benefits and one gets harmed

• both organisms benefit

Answer explanation

Parasitism-one is helped, one is harmed

Commensalism-one is helped, one does not care

Mutualism-both are helped

Competition-fighting for same resources

Predator/Prey-one eats the other

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

• F

• G

• H

• J

Tags

NGSS.MS-LS2-3

Which organisms play the largest role in converting nitrogen into various usable forms and back to a gas form?

• rabbits

• bacteria

• plants

• worms

Tags

NGSS.MS-LS2-3

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

• F

• G

• H

• J

• F

• G

• H

• J

• A

• B

• C

• D

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2