Lipids are a wide category of compounds that are known as biomolecules. Lipids include neutral fats, steroids, oils and waxes. They are created by the body naturally to be used in a variety of biological membranes and reactions.
Lipids perform a variety of functions in a biological system. They contribute to the structure of plasma membranes that enclose both cells and cellular organelles. Lipids also protect the organism from drying out. In humans, lipids are found in skin cells, where they prevent dry skin and keep water molecules inside of the body. Lipids insulate organisms against extreme environments, and they also regulate the activities of many hormones and enzymes.Learn More
The common characteristic of all lipids is they are hydrophobic, so they are insoluble in polar solvents, such as water. They are, however, soluble in at least one non-polar organic solvent. The reason lipids are hydrophobic is that their molecules have long hydrocarbon chains with 16 to 18 carbon atoms.Full Answer >
Biological science, or biology, is the study of living organisms, such as plants, animals and other living organisms. The subject of biology is divided into many separate fields, such as behavior, human anatomy, botany, physiology, zoology, ecology and genetics.Full Answer >
A biological key, also known as an identification key or a dichotomous key, is a way to classify organisms by giving the classifier two options in each stage until identification occurs. For example, in order to identify the tree, a biological key gives two choices – conifer or broadleaf – with a description of each one. Depending on the answer, another question pops up to narrow down the species.Full Answer >
Biological inheritance is broadly defined as physical heredity. Heredity, or inheritance in the biological sense, refers to the physical features that offspring inherit from their parents, such as eye color, shape of nose and mouth, height and other distinguishing physical characteristics.Full Answer >