Answer:
Renewable energy is over 90% of the energy use in the united states
Answer:
They have helical thickening of lignin in their walls to prevent collapse
Explanation:
the primary function of Xylem and its conducting vessels tracheids is to provide support and tranport water and minerals in plants.
Xylem vessels have layers of dead materials in the walls called LIGNIN. Lignin is a polymer; a very strong, hard materials that stop water passage through it,because it contains dead cells,
Therefore the presence of deposit of these strong impermeable, ligified walls in its walls prevent its collapse during mass flow of water of transpiration pull.
Hello friends..
Some (not all) of the nutritional value in vegetables is lost during the cooking process – but why? Vegetables are packed FULL of vitamins, which are essential for our overall diet and the chemical reactions within our bodies.
Vitamins are split up into two different groups: water-soluble (B-complexes, and C) and fat-soluble (A, D, E, and K). During the cooking process, water-soluble vitamins are more likely to be destroyed.
Hope this answer helps you..
Answer:
The rate of reaction depends on the rate determining step of a nonelementary reaction
Explanation:
A non elementary reaction is a reaction that proceeds in a sequence of steps. One of the steps is usually the slowest step in the reaction sequence. This slowest step is called the rate determining step. In an SN1 reaction, the rate determining step is the formation of the carbocation, the concentration of the carbocation affects the rate of reaction because it is involved in the rate determining step. The attack of the nucleophile is a fast step and does not affect the rate of reaction.
