Plant Homeostasis

What are the levels of organization in plants?

• Plants have cells, but not tissues.

• Plants are made up of cells, tissues, organs, and organ systems

• Plants contain cells and tissues, but not organs.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

What is the vascular tissue that carries water throughout a plant?

• phloem

• seedling

• xylem

______________, pores on leaves through which plants lose water and exchange carbon dioxide and oxygen.

• stomata

• seed

• stem

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

NGSS.MS-LS1-4

_____________________ is a vascular tissue that carries sugars and other foods throughout a plant.

• stems

• phloem

• roots

• xylem

Tags

NGSS.MS-LS2-3

Homeostasis is _________.

• controlling the environment
• maintaining internal balance
• not using any energy
• when plants grow towards light

Evaporative Cooling is when...

• some plants (eg: eucalypts) are able to change the orientation of leaves so they hang vertically during hot weather

• In extreme heat plants increase transpiration this leads to a loss of turgor pressure (water pressure inside plant cells) and leaves wilt

• stomata open, loss of water by transpiration

• some eucalypts can drop leaves during dry season

Tags

NGSS.MS-LS2-1

Turgor Pressure is when...

• some plants (eg: eucalypts) are able to change the orientation of leaves so they hang vertically during hot weather

• In extreme heat plants increase transpiration this leads to a loss of water pressure inside plant cells and leaves wilt

• stomata open, loss of water by transpiration

• some eucalypts can drop leaves during dry season

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In extreme heat plant will respond by

• Evaportive cooling, Turgor pressure, leaf orientation, opening and closing stomata and reseedling

• Anti Freezing, Becoming Dormant and Vernilisation

Tags

NGSS.MS-LS1-5

Leaf orientation helps the plant reduce heat by

• Decreases internal temperature by evaporative cooling

• Wilting allows the plant to

  reduce exposure of surface area to sun

• Reduce loss of water during heat of the day, reduces water stress

• Reduces surface area of leaf exposed to the sun

Tags

NGSS.HS-LS1-3

Dormancy is beneficial to a plant in

• Heat

• Cold

Tags

NGSS.MS-LS2-1