Flashback for Environment, Structure, and Function

Extreme weather conditions can change an ecosystem. What are some examples of negative effects on an ecosystem? (Select 2 answers)

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Identify each scenario as either primary or secondary succession.

Groups:

(a) Primary

,

(b) Secondary

• Occurs after a fire disrupts an ecosystem, and the ecosystem is overtaken by new species.

• Occurs on land cleared for farming

• Commonly includes lichens and mosses as pioneer species.

• Lava cools down to form bare rock

What would most likely slow down an ecosystem growing from shrubs to forests?

• soil that stimulates plant growth

• moving water

• an abundance of shrubs

• low rainfall and fires

Which statement describes how biodiversity affects an ecosystem?

• Having fewer animal species prevents the ecosystems from being affected by environmental stress

• Having fewer animal species allows more plants to grow

• Having a variety of organisms increase competition and causes animals in the ecosystem to die off

• Having large numbers of plant and animal species boosts productivity and preserved the ecosystem

Tertiary consumers ​ (a)   receive ​all the energy from the trophic level below them,

because ​ (b)   energy is lost to the environment.​

• do not
• do
• some
• all

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The food web shows some organisms found in a desert ecosystem.

Identify the organisms that obtain energy directly from primary consumers.

Select FOUR correct answers.

Members of the kingdom Animalia ​ (a)   nucleus and are ​ (b)   , heterotrophic organisms.

• do have
• do not have
• multicellular
• unicellular

Move the answers to the correct boxes

• nucleus

• Converts sunlight, water, and oxygen into sugar

• cell membrane

• Converts sugar into energy

• vacuole

• Stores genetic material to carry out cell instructions

• mitochondria

• Controls what goes in and out of the cell

• chloroplast

• Stores water, food, and waste

The main function of this system is...

• Excrete hormones throughout the body

• defend against infections entering the body

• send signals back and forth from the brain to the body

• circulate blood, nutrients, and gases throughout the body

Match the organ system with its function

• Helps move the body

• Muscular System

• Controls the body

• Circulatory System

• Transports oxygen and nutrients through the body

• Nervous System

• Removes waste

• Excretory System