Cactus Adaptations

What is the main reason why a cactus has needles?

• To store excess water.

• To reduce water loss and protect themselves from predators.

• To provide shade for other plants.

• To attract pollinators.

How do cacti store water in their bodies?

• thick leaves

• succulent stems

• water-filled fruits

• deep roots

What are some adaptations of cacti to survive in arid environments?

• Cacti have thick, waxy skin, spines instead of leaves, water storage in stems and roots, and shallow root systems.

• Cacti have a high rate of transpiration to conserve water

• Cacti have large, broad leaves to collect more sunlight

• Cacti have long, deep root systems to reach water sources

What is the function of cactus needles?

• The function of cactus needles is to attract pollinators.

• The function of cactus needles is to provide shade for the cactus.

• The function of cactus needles is to store water for the cactus.

• The function of cactus needles is to protect the cactus and reduce water loss.

How do cactus needles protect against herbivores?

• Sharp spines

• Electric shock

• Camouflage

• Poisonous thorns

What role do spines play in reducing water loss in cacti?

• Spines absorb water and prevent it from evaporating.

• Spines create a layer of still air that reduces evaporation.

• Spines release a protective coating that seals in moisture.

• Spines create a barrier that blocks water from escaping.

Why do cacti need to reduce water loss in their environment?

• To attract more sunlight

• To prevent soil erosion

• To survive in arid environments

• To conserve energy

What are some other ways cacti adapt to conserve water?

• Thick waxy outer layer on stems and leaves

• Ability to store water in their stems and roots

• Shallow but extensive root system to capture water quickly

• Spines that reduce water loss through transpiration

How do cacti obtain water in the desert?

• By storing water in their stems

• By absorbing moisture from the air

• Through their specialized root systems

• Through their leaves

What are some examples of cacti species that have unique adaptations?

• saguaro cactus, prickly pear cactus

• Christmas cactus

• barrel cactus

• jade plant