Answer:
The amount of organic matter in mineral (sand, loam or clay) soils ranges from very low being 1% by weight, to average being 2 to 4%, and high being greater than 5%. There are also “muck” or organic or peat based soils that are 30 to 40% organic matter. The general consensus is the more soil organic matter the better. approximately 45%
Soil Composition
The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.
Explanation:
Arachadonic acid is a carboxylic acid with a 20 carbon chain and four cis-double bonds. They do not have any functional groups. It is a polyunsaturated fatty acid present in the phospholipids of the membranes in the cells of the body, brain, muscle and liver. Prostaglandins are the active lipids compounds abundant in human tissue. They are a 20 carbon chain saturated fatty acids with a 5 carbon ring forming a cyclopentane. It has one trans-double bond, two hydroxyl functional groups and a ketone functional group.
A student looking through a light microscope saw this cell in cytokinesis. This cell is most likely from a plant.
In 1884, a bacteriologist named Christian Gram created a test that could determine if a bacterium had a thick, mesh-like membrane called peptidoglycan. Bacteria with thick peptidoglycan are called gram positive. If the peptidoglycan layer is thin, it's classified as gram negative.
Answer:
there are 4 major classes of biological macromolecules
