Metal-Hoarding Plants and Their Adaptations

The video explores metal-hoarding plants, which contain high levels of nickel, much more than typical ores. These plants are used to clean up abandoned nickel mines and can be profitable when harvested. They absorb metals actively using special proteins, storing them in leaf cells to avoid toxicity. This metal hoarding may serve as a defense mechanism against herbivores, making the plants toxic without producing their own toxins.

What makes the sap of the metal-hoarding plant unique compared to typical nickel ores?

• It is bluish-green in color.

• It contains ten times more nickel than typical ores.

• It is used in jewelry making.

• It contains less nickel than typical ores.

How do metal-hoarding plants contribute to environmental cleanup?

• By extracting leftover nickel from soil.

• By providing shade.

• By absorbing carbon dioxide.

• By producing oxygen.

What is the typical nickel content in most plants?

• 50%

• 0.0005%

• 5%

• 0.5%

Why is surplus nickel usually toxic to plants?

• It attracts more herbivores.

• It enhances photosynthesis.

• It inhibits cell division and harms chlorophyll.

• It increases water absorption.

How do metal-hoarding plants manage to survive with high levels of nickel?

• By producing more flowers.

• By growing faster.

• By reducing their size.

• By using special proteins to absorb and store metals.

What role do special proteins play in metal-hoarding plants?

• They produce flowers.

• They repel insects.

• They transport and store metals within the plant.

• They help in photosynthesis.

How do metal-hoarding plants differ from typical plants in terms of metal absorption?

• They absorb less metal.

• They do not absorb any metal.

• They absorb metals passively.

• They actively absorb more metal using special proteins.

Why might metal-hoarding plants be less appealing to herbivores?

• They grow in inaccessible areas.

• They have a bitter taste.

• They are super toxic due to high metal content.

• They are too small.

What is a potential benefit of salt-hoarding in plants?

• It enhances the plant's color.

• It makes the plant grow taller.

• It helps in drought-prone areas by attracting water.

• It attracts more insects.

What is a common feature between metal-hoarding and salt-hoarding plants?

• Both hoard substances that are generally toxic at high concentrations.

• Both grow in cold climates.

• Both are used in construction.

• Both are used in cooking.