Refer to Figure 2. Levels of Organization in the Student’s Model. Arrange the following in the correct order from simplest to most complex:

Molecules, Organelles, Cells, Tissues, Organs, Organ Systems, Organism

Organelles, Molecules, Cells, Tissues, Organs, Organ Systems, Organism

Cells, Molecules, Organelles, Tissues, Organs, Organ Systems, Organism

Molecules, Cells, Organelles, Tissues, Organs, Organ Systems, Organism

In a plant, when the turgor pressure is low, the stomata close and the leaves wilt. When the turgor pressure is high, the stomata open and the leaves are firm. Based on the data in Table 1, under which conditions would the leaf stay firm?

A) Ordinary brightness, very humid

B) Ordinary brightness, very dry

The student plans to use the results of the investigation to further study stomata. The student builds a model to demonstrate stomata structure and function at the lowest level of biological organization. Investigating which question would require a model that is designed to this level?

How do the cells surrounding stomata respond to environmental stimuli?

How does the opening and closing of stomata affect other tissues in a leaf?

What effect do stomata have on survival of the plant when they are closed for long periods of time?

How do stomata affect the transport of water through plant organs when they respond to different levels of humidity?

Based on the data table, what can be learned if soil moisture is used as an independent variable in a second investigation?

The effect of soil moisture on plant growth can be studied.

The temperature of the soil will remain constant.

Soil moisture does not affect any results.

The data table cannot be used for further investigation.

The student studies the data table and decides to design a second investigation in which soil moisture will be an independent variable. Which of the following best predicts the results from this experiment over time?

Soil moisture will affect plant growth, with higher moisture generally leading to increased growth up to an optimal point.

Soil moisture will have no effect on plant growth over time.

Lower soil moisture will always result in the highest plant growth.

Plant growth will decrease as soil moisture increases indefinitely.

What was the main environmental impact of increasing wild sheep population on Santa Cruz Island?

Overgrazing and trampling of native plant species

According to the passage, in areas with severe sheep impact, what happens to most accessible vegetation?

Most accessible vegetation was consumed.

Most accessible vegetation grew rapidly.

Most accessible vegetation remained untouched.

Most accessible vegetation became more diverse.

A scientist claims that sheep activities are impacting the entire food web of Santa Cruz Island. Which statement best evaluates this claim?

The claim is valid because the bird diversity decreases as the plant growth impact increases.

The claim is not valid because diverse plants and birds are still found on the island.

The claim is not valid because the sheep population is unevenly distributed over the island.

The claim is valid because plant growth is most impacted in areas with high sheep population densities.

A scientist claims that once sheep are present, exact sheep population density has little impact on an ecosystem. Which statement best uses the data provided to evaluate this claim?

The claim is not valid because small changes in sheep population density lead to very different outcomes in terms of plant growth impact.

The claim is valid because the sheep population is limited by the carrying capacity of the existing island ecosystem.

The claim is not valid because once sheep are introduced to an area it is inevitable that its ecosystem will radically change.

The claim is valid because some elements of the existing ecosystem survive all levels of sheep population density on the island.

A student is interning with a conservation group that seeks to restore the size and diversity of bird populations on Santa Cruz Island. The student designs a plan of ________.

C. reducing and controlling the size of sheep populations.

A. increasing the number of invasive plant species.

B. introducing new predator species to the island.

D. building more roads and infrastructure on the island.

The student explains that when this solution is implemented, the ecosystem overall can be expected to show ________.

E. stability because forces for change are removed.

A. rapid decline in all populations.

B. immediate extinction of key species.

C. unpredictable and chaotic changes.

Which two pieces of data from Table 2 provide evidence that sheep are significantly changing the physical landscape of Santa Cruz Island, and what process do these data suggest?

Decrease in native plant cover and increase in bare ground; overgrazing by sheep leads to soil erosion.

Increase in native plant cover and decrease in bare ground; sheep promote plant growth.

No change in plant cover or bare ground; sheep have no effect on the landscape.

Increase in tree cover and decrease in soil erosion; sheep help stabilize the ecosystem.

Based on the diagrams, what is the most likely reason for the color change in the object suspended in the beaker?

The plants released a gas during photosynthesis

As light intensity increases, what happens to the number of oxygen bubbles released per minute?

It increases and then levels off

Based on the graph in Figure 1, the relationship between light intensity and oxygen release in pondweed is:

Oxygen release increases as light intensity increases.

Oxygen release decreases as light intensity increases.

Oxygen release remains constant regardless of light intensity.

Oxygen release is not affected by light intensity.

Based on the data from Experiment 1, which statement best explains how light intensity affects pondweed’s ability to produce energy for life processes?

There is a maximum sunlight intensity above which energy production no longer increases.

Energy production is constant across all sunlight intensities.

There is no clear link between sunlight intensity and energy production.

There is a minimum sunlight intensity below which the energy production becomes small but constant.

What is happening to photosynthesis in Box 1?

Photosynthesis is not changing.

Explain what is happening with the pondweed population in Box 2 and why.

The pondweed population is decreasing because of lack of sunlight.

The pondweed population is increasing due to favorable conditions.

The pondweed population remains unchanged due to stable conditions.

The pondweed population is dying because of pollution.

The contents of Boxes 1 and 2 affect carbon cycling in the pond ecosystem by:

producing and consuming carbon dioxide through photosynthesis and respiration

removing all carbon from the ecosystem

preventing any exchange of gases in the pond

stopping the decomposition process completely

Which statement best explains how the data in Experiment 2 relates to the availability of energy for life processes?

Pondweed fails to produce energy for life processes when oxygen is absent.

Pondweed produces more energy in anaerobic conditions than in aerobic conditions.

Pondweed uses different sources of matter to produce energy in aerobic and anaerobic processes.

Pondweed stores energy for life processes in molecules other than ethanol when oxygen is present.

DC Cape Unit #3 Test

Authored by John Hazell

Biology

9th Grade

NGSS covered

Used 7+ times

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51 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. What are these openings called?

Chloroplasts

Stomata

Veins

Roots

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. Which diagram shows an open stoma?

The left diagram shows an open stoma.

The right diagram shows an open stoma.

Both diagrams show open stomata.

Neither diagram shows an open stoma.

Tags

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. These openings are called stomata (singular: stoma).

True

False

Tags

NGSS.MS-LS1-6

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Based on the experiment described, what is the stomata state when the brightness is 'Very bright' and the humidity is 'Humid'?

Tags

NGSS.MS-LS1-5

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Based on the experiment described, what is the stomata state when the brightness is 'Very bright' and the humidity is 'Dry'?

Tags

NGSS.MS-LS1-5

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Based on the experiment described, what is the stomata state when the brightness is 'Ordinary brightness' and the humidity is 'Very humid'?

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Based on the experiment described, what is the stomata state when the brightness is 'Ordinary brightness' and the humidity is 'Very dry'?

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DC Cape Unit #3 Test

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. What are these openings called?

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. Which diagram shows an open stoma?

A student uses a light microscope to examine the leaf of a tomato plant. She observes that tiny openings in the plant leaves open and close under different light conditions. These openings are called stomata (singular: stoma).

Based on the experiment described, what is the stomata state when the brightness is 'Very bright' and the humidity is 'Humid'?

Based on the experiment described, what is the stomata state when the brightness is 'Very bright' and the humidity is 'Dry'?

Based on the experiment described, what is the stomata state when the brightness is 'Ordinary brightness' and the humidity is 'Very humid'?

Based on the experiment described, what is the stomata state when the brightness is 'Ordinary brightness' and the humidity is 'Very dry'?

Based on the experiment described, what is the stomata state when there is 'No light - dark' and the humidity is 'Humid'?

Based on the experiment described, what is the stomata state when there is 'No light - dark' and the humidity is 'Dry'?

Refer to Figure 2. Levels of Organization in the Student’s Model. Arrange the following in the correct order from simplest to most complex:

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