2.2.6

From where do autotrophs obtain their energy?

• The sun
• Other organisms

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is another name to describe a heterotroph?

• Consumer
• Producer

Which type of organisms perform photosynthesis?

• Autotrophs
• Heterotrophs

Tags

NGSS.MS-LS1-6

The main difference between autotrophs and heterotrophs in terms of obtaining their nutrient requirements is that:

• autotrophs must take in all required organic and inorganic nutrients; heterotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.

• There is no difference in terms of autotrophs and heterotrophs obtaining their nutrient requirements.

• heterotrophs must take in all required organic and inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.

• heterotrophs must take in all required organic but can produce some of their inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.

In an experiment, two leaves were taken from the same plant and examined under a light microscope. In leaf 1 most of the stomata were closed; in leaf 2, most of the stomata were open.

What is the most likely explanation for this difference?

• Leaf 1 was removed when the plant was still growing; leaf 2 was removed when the plant was mature.

• Leaf 1 was removed when the plant was water stressed; leaf 2 was removed when the plant was not water stressed.

• Leaf 1 was removed on a cold day; leaf 2 was removed on a very hot day.

• Leaf 1 was removed during the day; leaf 2 was removed at night.

Tags

NGSS.HS-LS1-3

Use the following picture to answer:

Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.

The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.

This indicator changes colour due the amount of carbon dioxide present.

It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).

Which option correctly identifies all of the test tubes in which cellular respiration would be occurring?

• 1, 3, 5, 7

• 1, 2, 3, 5, 6, 7

• 2, 3, 6, 7

• 1, 2, 3

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Use the following picture to answer:

Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.

The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.

This indicator changes colour due the amount of carbon dioxide present.

It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).

Which of the test tubes would be expected to have the lowest pH at the conclusion of the experiment?

• 7

• 3

• 2

• 1

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Different technologies such as radioactive tracing using radioisotopes can trace the development and movement of the products of photosynthesis.

Using these technologies, it was found that the source of the oxygen gas released in the process of photosynthesis was:

• the water.

• the carbon dioxide gas.

• the glucose.

• both the water and carbon dioxide gas.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Cellular respiration in plants occurs:

• during the day only.

• during the night only.

• during the day and night.

• only when the stomata are open.

Tags

NGSS.HS-LS1-7

Which correctly identifies the carbon source for autotrophs and heterotrophs?

• Autotrophs obtain carbon from nutrients in the soil

• Heterotrophs primarily obtain carbon from the atmosphere

• Autotrophs obtain their carbon source from the air

• Heterotrophs do not require a carbon source since they do not photosynthesise

Tags

NGSS.MS-LS1-6