Question

The chemical that is used by some plants as a defense system is

A) Hydrochloric acid
B) Potassium hydroxide
C) Chlorophyll
D) Hydrogen cyanide​

Answer 1

Hydrogen cyanide is used by some plants as a defense mechanism.

• Some of the examples of the plants that produce hydrogen cyanide as a defense mechanism are apricots, almonds, peaches, apples, cassava, etc.
• These plants use hydrogen cyanide to protect themselves from other organisms (such as herbivores, insects, etc. ) eating them.
• These chemicals are not activated until and unless anyone harms the plants, but since the plants cannot run away or attack, when they are being attacked upon they release these chemicals.

Answer 2

The chemical used by few plants as a defense system is Hydrogen Cyanide.

So, the correct option is (D)

Explanation:

1. Plants that uses defensive chemicals includes noxious, toxic, indigestive and poisonous substance that helps in repelling or harming the predators.

2. Apples, apricots, peaches, etc, are some examples that secretes hydrogen cyanide as their chemical defense mechanism.

3. Such plants uses this chemical for defense and to protect themselves from other predators.

4. Other kinds of adaptations for protecting plants and preventing it from damage includes develop of thorns, hard shells, spines, etc.