Chapters 8/19/20 The Working Cell: Energy from Sunlight

Chlorophyll

Pigment (protein) that gives the chloroplast its green color

Guard Cells

Cells that form an opening in the surface of the leaf

Stomata

Opening formed by 2 guard cells, site of gas and water exchange with the enviornment, and helps maintain homeostasis

Electromagnetic Spectrum

The range of types of electromagnetic energy

What 3 things happen to light when it strikes an object?

Reflected, transmitted, and absorbed

Transpiration

The evaporation of water from plants it occurs at the leaves while the stomata is open for the passage of CO2 and O2 during photosynthesis

What plant organ loses water by transpiration?

Leaves

Which plant organ takes up water to replace that lost by transpiration?

Roots

What is the name of the cells on either side of the stomate opening?

Guard cells

What conditions increase transpiration?

Warm, dry, windy conditions

How do stomate openings reduce water loss?

When they are closed, less water evaporates out

Under what conditions is transpiration the slowest?

Cold, moist, calm days

What would happen to transpiration if a plant was coded with petroleum jelly?

The rate of transpiration would decrease