Organic compounds function in all living things as carbohydrates, lipids, protein and nucleic acids. All these components provide the energy and the means to maintain and create life.
Carbohydrates provide energy for all living things and form the basis for some of their structures. Simple carbohydrates, or sugars, are monosaccharides that are directly absorbed. Glucose is a monosaccharide that is the basic fuel for life. Cellular respiration begins with glucose, and is the main product of photosynthesis.
Linked monosaccharides, or polysaccharides, are complex carbohydrates that are broken down by enzymes into simple sugars so they can be absorbed by the body. Most important are the starches, which are a storage form for carbohydrates. Glycogen is stored in the liver as glucose. Cellulose, such as cotton fabric and paper, is primarily a structural carbohydrate.
Lipids make up waxes, fats and the steroids that compose many hormones. When oxidized, fat provides almost twice the energy of carbohydrates. Fats are often stored in plant seeds and in the adipose tissue of animals for reserve energy.
All life consists of proteins, which build and repair tissues and make up the enzymes that catalyze chemical reactions inside cells. Proteins also store a cell’s reserve energy.
There are two types of nucleic acids: deoxyribonucleic acid and ribonucleic acid. DNA stores and transfers genetic information, while RNA directly codes for amino acids and serves as the messenger between DNA and ribosomes to make proteins.Learn More
According to Discovery, avoiding exposure to extreme temperatures and staying hydrated are the two most important considerations in the desert. Because the body needs to work harder to keep cool when the head is exposed to the sun, covering the head with a hat or other article of clothing is first priority. CNN recommends traveling during the cooler hours and seeking shelter when the midday sun hits.Full Answer >
The tundra biome has the shortest growing season, ranging from 50 to 60 days in the Arctic tundra to up to 180 days in Alpine tundras. Tundra biomes are distinguished by low biodiversity and domination by mosses, lichens and perennial shrubs.Full Answer >
If the Earth were to suddenly stop spinning, it would be the high winds, rather than gravity, that would immediately remove all traces of life from the Earth's surface. Thankfully, there is virtually no chance of the Earth's seizure of rotation.Full Answer >
Environmental factors refer to any element that might bring change to an existing environment. This include human factors such as litter that does not biodegrade, as well as such natural forces as the weather. One thing that is always true about the environment is that it is always in the state of change. Some of these shifts are easy to see, like an avalanche that happens on the side of a mountain as the result of traffic construction activity, while others are less obvious, such as sand finally becoming sandstone.Full Answer >