Question

_________- are solid at room temperature and found on the surfaces of plant leaves and stems.

Answer 1

Lipids are substances solid at room temperature and found on the surfaces of plant leaves and stems, forming a protective water-repellent layer. The option (A) is correct.

Step-by-step explanation:

The substances that are solid at room temperature and found on the surfaces of plant leaves and stems are lipids. Lipids include various compounds such as fats, oils, waxes, phospholipids, and steroids. In the form of waxes, lipids coat the leaves and stems of plants, providing a protective layer that helps prevent water loss and shields them from environmental damage.

This protective feature is possible due to the hydrophobic nature of lipids, which repels water and helps maintain the plant's internal moisture balance. Unlike lipids, proteins, carbohydrates, and nucleic acids do not generally form protective external layers on plants. Therefore, option (A) is correct.

This question is not complete, Here I am attaching the complete question:

_________- are solid at room temperature and found on the surfaces of plant leaves and stems.

A) Lipids

B) Proteins

C) Carbohydrates

D) Nucleic acids