Life science encompasses many areas of study. Anatomy involves studying the internal structure of an organism after dissection, and histology focuses on the study of tissue organization and structure under a light microscope. Cell biology involves the study of the morphological, biochemical, and physiological aspects of cells, including their evolution and genetic makeup. Molecular biology examines how bio-molecules are synthesized and communicate with one another. Physiology involves the study of how organisms function and how they adapt to their environments.
Those interested in studying life will typically major in one of these disciplines. Their future plans will likely include graduate studies or professional training. Some even pursue teaching opportunities. However, these professional tracks are competitive and highly selective, and most students end up going directly into the workforce. If you are interested in studying life science, you should make sure that you explore the different career options available. When it comes to categorization, life science is divided into three basic branches: Archaea, Bacteria, and Eukaryotes. Archaea contains bacteria, while Bacteria comprise organisms that lack nuclei. Eukaryotes are the smallest of the three. Biologically important molecules are considered macromolecules, and they are composed of smaller units called monomers. One of the examples of a macromolecule is deoxyribonucleic acid (DNA), which contains the instructions needed for a living organism to function. Animals are multicellular organisms that rely on eating other organisms for nutrition. There are two major classifications of animals: invertebrates and vertebrate. Vertebrate animals are multicellular and have an internal backbone. Invertebrates are one of the most diverse groups of organisms on Earth, with a wide range of species. Many animals can even perform complex behaviors. Evolutionary relationships of living things are based on genetic and physical characteristics. Phylogenetic trees depict the evolution of the various life forms on Earth. They are made up of internal nodes and branches that represented ancestors and points in evolution when an ancestor diverged into two different species. Adaptation is the process in which organisms modify their characteristics so that they can survive in a specific environment. This process is a result of natural selection and occurs in every lineage of organisms. Examples range from heat-resistant Archaea to nectar-feeding moths. Adaptation allows organisms to maximize their reproductive potential while minimizing the effects of environmental change. As you can see, there are many branches of life science and many specializations. You can even specialize in one or more of them. There is a science for just about everyone. Take a quiz and see how much you know about them! So, what are the three branches of life science? The basic branches of life science include ecology, biology, and genetics. Organisms and tissues belong to organ systems, and ecosystems are the communities of organisms and other organisms in a specific location. The biosphere is the highest level of organization, representing the zones where life exists on Earth.
0 Comments
Leave a Reply. |