Quick Answer: What Is Excurrent Stem?

What is the difference between stem and root?

Stem shows positively phototropic and negatively geotropic growth.

Stem possess nodes and internodes.

Branches, leaf, flower bud and bracts are developed from nodes.

Root: Root is the part of the plant which lies below the surface of the soil..

What is Excurrent mean?

1 : characterized by a current that flows outward the clam’s excurrent siphon. 2 : having the axis prolonged to form an undivided main stem or trunk (as in conifers) — compare deliquescent sense 2.

What is Excurrent in biology?

Excurrent. (Science: botany) Projecting beyond the tip, as the midrib of a leaf or bract.

What is an Excurrent tree?

Excurrent Trees. Are trees that have one central leader better than multi-trunked forms? EXCURRENT – In arboriculture, a tree that has a straight trunk from ground level to the very tip. Many trees and arborescent shrubs (tree-like shrubs) are selected for this very excurrent growth structure.

What is meant by Deliquescent?

Deliquescence, the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. … A substance that absorbs moisture from the air but not necessarily to the point of dissolution is called hygroscopic.

What are weak stems?

Weak Stems: The stems are thin, soft and weak. They cannot stand erect and therefore, require a support. Weak stems can be upright or prostrate.

How do humans use plant stems?

Stems are also a good source of making paper, rayon, and cellophane through cellulose, which is obtained from the pulpwood. It is also one of the needed materials in making wood alcohol and acetone. The bark yields, besides fiber many other important products.

What would happen if we break the stem of a plant?

If we break the stem of a plant some plants will die some will split and grow it depends upon the plant and the amount of tissue damage.

What is the main purpose of a stem?

The primary functions of the stem are to support the leaves; to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis; and to transport these products from the leaves to other parts of the plant, including the roots.

What is the cause of Excurrent habit in Pinus?

In plants with strong apical dominance, auxin produced in the apical meristem inhibits axillary buds near the apical meristem from developing into actively growing shoots. Thus, giving rise to an excurrent habit as seen in many evergreen trees like Pinus.

Which cement is Deliquescent?

calcium chloride cementSome of the common deliquescent salts are calcium chloride, magnesium chloride, zinc chloride, ferric chloride, etc. Because of calcium chloride in calcium chloride cement, the cement has deliquesance. Sol: Concrete laitance is a layer of weak and nondurable cement and fine particles originating from aggregates.

Is Salt a Deliquescent?

Most deliquescent substances are salts. … While table salt or sodium chloride (NaCl) may be deliquescent if the particles are small and the humidity is very high, salt is usually considered to be hygroscopic. Because of their affinity for water, deliquescent substances find use as desiccants.

Is CaO Deliquescent?

Quicklime (calcium oxide) (CaO) is a hygroscopic substance. Others are deliquescent substances.