Plant Systems & Homeostasis

What is turgor pressure and what happens without it?

• pressure exerted by water inside the cell pushing against the cell wall

• pressure of the outside of the cell wall

• no pressure at all

• pressure exerted by gravity

Tags

NGSS.MS-LS1-2

Leaves and stems growing towards the sunlight exhibits what kind of tropism?

• geotropism

• phototropism

• gravitropism

• autotropism

Tags

NGSS.MS-LS1-5

The roots of a plant growing downwards exhibits what kind of tropism?

• Phototropism

• Negative geotropism

• Positive geotropism

• autotropism

How is the turgor pressure force exerted on the inside of a seed to split it open so it can emerge into a seedling?

• Water within the seed pushes out against the seed coat

• Gravity pushes up on the seed coat

• Gravity pulls down on the seed coat

• Water from the soil pushes in through the seed coat

Tags

NGSS.MS-LS1-2

In a germinating seed, the downward growth of roots and the upward growth of leaves and stems are the plant's response to what?

• water

• osmosis

• sunlight

• gravity

Tags

NGSS.MS-LS1-5

What is the internal stimulus that would cause a plant to wilt?

• Exposure to too much sunlight

• Exposure to very little sunlight

• A lack of water in the stem

• An abundance of water in the stem

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What internal and external conditions would most likely cause the stomata in a plant to be open?

• There is a lack of water in the plant, and it is daytime.

• There is a lack of water in the plant, and it is nighttime.

• There is plenty of water in the plant, and it is daytime.

• There is plenty of water in the plant, and it is nighttime.

Tags

NGSS.MS-LS2-1

Scientists working in space would most likely be studying the effects of what kind of stimuli on plant growth?

• temperature

• radiation

• oxygen

• gravity

Tags

NGSS.MS-LS1-5

What stimulus causes the roots and stems to grow in opposite directions?

• Water

• Temperature

• Gravity

• Light

Tags

NGSS.MS-LS1-5

What stimulus is most likely to cause the stomata to close?

• Carbon dioxide concentration decreasing in the atmosphere

• Carbon dioxide concentration increasing in the atmosphere

• Water volume decreasing in the soil

• Water volume increasing in the soil

Tags

NGSS.MS-LS2-1