The Incredible World of Plants | SciShow Compilation

What is the process called when plants tuck their leaves in at night?

• Heliotropism

• Phototropism

• Nyctinasty

• Thigmonasty

What molecule in plants absorbs light and changes forms to help them tell whether it's day or night?

• Chlorophyll

• Auxin

• Phytochrome

• Cellulose

What plant structure acts as a flexible joint at the base of a leaf, allowing it to move?

• Stomata

• Pulvinus

• Petiole

• Xylem

What is the plant movement called when leaves or flowers actively follow the sun during the day?

• Geotropism

• Heliotropism

• Hydrotropism

• Chemotropism

What was the main goal of the 1989 NASA study regarding houseplants?

• To discover new plant species for space travel.

• To determine if plants could survive in zero gravity.

• To test if indoor plants could purify air on Earth and in space.

• To find out how much water plants need in space.

What are volatile organic compounds (VOCs) and where can they be found indoors?

• Natural gases released by plants.

• Chemicals found in household products and building materials.

• Nutrients that help plants grow.

• Odorless gases that are harmless.

Why might the air purification results from a lab study not apply to a typical home or office?

• Lab plants are usually much larger than houseplants.

• Lab studies use different types of air than homes.

• Lab conditions are highly controlled and involve small, sealed spaces.

• Plants in labs are given special fertilizers.

What is the mutually beneficial exchange between plants and mycorrhizae fungi?

• Plants provide water, and fungi provide oxygen.

• Plants provide carbon (sugars), and fungi provide nutrients like nitrogen and phosphorus.

• Plants provide sunlight, and fungi provide soil.

• Plants provide defense chemicals, and fungi provide warnings.

How can plants in a forest use underground networks to support each other?

• By sending out toxins to kill competing plants.

• By sharing extra nutrients and carbon with other trees.

• By attracting harmful worms and fungi to the network.

• By changing their species to adapt to new conditions.

What is a significant difference between wild bananas and the Cavendish bananas commonly sold in stores?

• Wild bananas are much larger than Cavendish bananas.

• Cavendish bananas are sweeter than wild bananas.

• Wild bananas contain fertile seeds, while Cavendish bananas do not.

• Cavendish bananas are native to Southeast Asia, unlike wild bananas.