8.L.5.1 and 8.L.5.2

Why are digestion and respiration important to the body?

• They control the production of hormones in the body.

• They build muscle and bone that the body needs.

• They store food for the body.

• They help provide the energy needed for body functions.

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8.L.5.2

What is involved in creating genetically modified bacteria?

• allowing them to reproduce freely

• changing their food source

• using biotechnology techniques

• growing them on selected plants

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8.L.2.1

How has genetic engineering helped farming?

• by developing better fertilizer for crops

• by creating crops that resist some diseases

• by producing soil that makes crops grow better

• by producing faster ways to harvest crops

Answer explanation

Biotechnologist use tools to place genes into the cells of the crops to make the resistant to a particular viral, bacterial o fungal disease. The plants will grow and have the gene in them that will produce the protein, which will act as an antibody to fight the infection and prevent the plant from developing the disease.

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8.L.2.1

A diagram of the carbon cycle is shown below. Use the diagram below to answer the question. Which of the following best explains how the cycling of carbon is connected to the energy flow within an ecosystem?

• The cow releases carbon dioxide into the atmosphere through the process of cellular respiration.

• The tree releases carbon dioxide into the atmosphere through the process of cellular respiration.

• The tree absorbs carbon dioxide through the

  process of photosynthesis.

• The cow absorbs carbon dioxide through the process of photosynthesis.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What kind of Ecosystem is known as sustainable?

• The one in which all species are in balance

• The one in which there are no animals

• The one in which animals feed on each other

• None of the above

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5

The chart below shows the human population and the fox population in an area. Use the chart to answer this question. Which best explains the relationship between the human and fox populations in the ecosystem?

• Humans compete for the same space as foxes, causing the fox population to decrease.

• Humans compete for the same prey as foxes, causing the fox population to decrease.

• Humans are affected by the same diseases as foxes, causing both populations to change in the same way.

• Human populations and fox populations are not interconnected.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In a food chain, food web, or energy pyramid how does the energy flow through the ecosystem. Describe this using producer, consumers, and decomposers. You may use primary, secondary, tertiary, autotroph, and hetotroph.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Use the food web diagram to answer the question. Which organisms in the food web are competing for the same food resource?

Tags

NGSS.MS-LS2-1

In the ocean, a sea anemone attaches itself to the shell of a hermit crab. The stinging arms of the sea anemone protect the hermit crab, while the movement of the hermit crab brings food to the sea anemone. Which best describes the relationship between the sea anemone and the hermit crab?

• coexistence

• mutualism

• competition

• parasitism

Tags

NGSS.MS-LS2-2

This energy pyramid model the flow of energy between organisms. Use the diagram to help you answer the question.

• The energy needs of organisms increase from level to level in an ecosystem. With each level of the pyramid, only 10% of the energy available is used by organisms.

• The energy needs of organisms decrease from level to level in an ecosystem. With each level in an ecosystem transferring only 10%. This means that the remaining 90% is the energy used and lost as heat.

• The energy needs of organisms increase from level to level in an ecosystem. Therefore, the total amount of energy available at each level increases in an ecosystem.

• The energy needs of organisms do not flow from level to level in an ecosystem. Therefore, the total amount of energy stays the same in an ecosystem.

Tags

NGSS.MS-LS2-3