2023 Review - Unit 3 CBA

Which part of the plant above demonstrates the greatest amount of turgor pressure?

• Part A

• Part B

• Part C

• Part D

In order for an embryo to emerge from a seed and grow into a seedling, the seed coat must split open. Which diagram illustrates the force exerted by turgor pressure to split open the seed coat?

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What caused the behavior of the plant in the diagram above?

• Response to gravity

• Negative homeostasis

• Excessive humidity

• Lack of turgor pressure

Students observed a plant left by a window over several days. The plant was watered daily. After three days, the plant began to grow towards the window. Why is the plant growing towards the window?

• Heat from the Sun caused the plant to grow towards the window.

• The plant is leaning towards the window to get fresh air.

• The plant is responding to the stimulus of sunlight.

• The plant is responding to water in the air growing towards it.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which student correctly identified the internal cause of the wilted plant?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.MS-LS1-5

The picture shows a gerbera daisy that has experienced a change called wilting. Which of the following statements best describes what has happened from Picture A to Picture B?

• Water entering the plant increased the turgor pressure in the cells of the flower

• Water entering and leaving the cells of the flower at equal rates kept turgor pressure equal

• Lack of water in the soil decreased the turgor pressure in the cells of the flower

• Lack of sunlight on a cloudy day caused the flower to lose turgor pressure

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The picture shows a seed germinating and growing into a young plant. Many forces are at work in the process of forming a seedling. The roots of the seedling grow downward into the soil, and the stem grows upward above the soil.

What stimulus is the seedling responding to that causes the roots and stem to grow in opposite directions?

• Water

• Light

• Gravity

• Temperature

Tags

NGSS.MS-LS1-5

Seeds that are planted upside down are still able to grow into mature plants. Which explanation best explains this phenomenon?

• The roots change into branches, and the branches turn into roots

• The roots grow toward the force of gravity, and the shoots grow away

• The plant will become a smaller version of a mature plant

• Roots always grow toward the dark, and shoots grow towards the light

Tags

NGSS.MS-LS1-5

A scientist wants to observe how a plant reacts to a certain type of auxin hormone that the plant naturally produces. She places a small patch that releases auxin on one side of the plant. She places the plant in a room where light shines. A drawing of the plant before the experiment and after a week of the experiment is shown below.

Based on your investigation of phototropism in plants, what is the relationship between auxin and phototropism?

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Which of the following demonstrates an organ providing a force?

• The eye transmits information to the brain

• The heart contracts and expands to move blood

• The kidney filters waste from blood

• The skin protects other organs from damage