Plant Biology and Communication Concepts

When grass is cut, it releases chemicals that warn nearby plants. What is the purpose of these chemicals?

• To attract pollinators.

• To help the cut grass heal faster.

• To signal nearby plants to prepare defenses against damage.

• To make the grass smell pleasant.

If all living things on Earth were combined into one mass, approximately what percentage would be made up of plants?

• Less than 1%

• 20%

• 50%

• 80%

What essential gas, vital for the survival of many living organisms, is produced as a byproduct of photosynthesis?

• Carbon dioxide

• Nitrogen

• Oxygen

• Hydrogen

Which of the following common items is NOT primarily derived from a plant?

• Cotton sheets

• Loofah

• Toothpaste (containing cellulose gum and mint)

• Plastic water bottle

Besides food, what are some other ways plants are used by humans?

• Only for shelter and clothing.

• As medicines, poisons, clothing, and shelter.

• Primarily for fuel and construction.

• Exclusively for decorative purposes.

How do living stone plants (Lithops sp.) perform photosynthesis when most of their body is underground?

• They absorb sunlight through their roots.

• They have special leaves that act like fiber optic cables to bring sunlight underground.

• They only perform photosynthesis at night.

• They rely on other organisms for energy.

What defines a Genetically Modified Organism (GMO)?

• Any organism that has been cross-bred with another species.

• Living things with genes altered in ways that don't happen naturally.

• Organisms grown using only organic farming methods.

• Plants that have been selectively bred over many generations.

How do plants communicate information about dangers like drought to neighboring plants?

• They release visible smoke signals.

• They change the color of their leaves to warn others.

• They share signals about their stress state through touching roots, causing stomata to close.

• They emit loud sounds that alert nearby plants.