Mechanical Plant Defenses

Plants, though immobile, have developed various defenses against predators. These include mechanical defenses like thorns and spinose structures, as well as trichomes that can be sticky or release chemicals. Raphides are needle-like structures that can poison herbivores. Some plants use fig monastic movements to appear unappealing. These adaptations help plants survive in a world full of threats.

What is the primary reason plants need to develop defenses?

• To attract pollinators

• To protect themselves from predators

• To enhance photosynthesis

• To improve soil quality

Which of the following is considered a mechanical defense in plants?

• Rapid growth

• Color change

• Chemical secretion

• Spinose structures

What is the function of trichomes on plant leaves?

• To store water

• To attract pollinators

• To deter insects

• To aid in photosynthesis

Which plant structure is known for releasing chemicals like histamine?

• Trichomes

• Spinose structures

• Fig monastic cells

• Raphides

How do raphides protect plants from herbivores?

• By releasing a pleasant aroma

• By changing the plant's color

• By causing physical damage and releasing toxins

• By enhancing the plant's growth

What is the role of fig monastic movements in plant defense?

• To attract insects for pollination

• To make the plant appear unappealing

• To increase the plant's height

• To enhance the plant's color

What happens to the Mimosa pudica when it is touched?

• It grows rapidly

• It releases a fragrance

• Its leaves close or shrink

• It changes color