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Aug 17, 2024 · As a field of science, biology helps us understand the living world and the ways its many species (including humans) function, evolve, and interact. Advances in medicine, agriculture, biotechnology, and many other areas of biology have brought improvements in the quality of life.
- Advances to The 20th Century
Biology - Evolution, Genetics, Microbiology:...
- The Discovery of Cells
Biology - Cell Discovery, Microscopy, Histology: Of the five...
- Aristotelian Concepts
Biology - Aristotle, Organisms, Cells: Around the middle of...
- Morphology
Cuvier in particular was among the first to study the...
- Evolution
Biology - Evolution, Genetics, Species: In his theory of...
- Microbiology
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- Biology
Biology - Evolution, Genetics, Classification: There are...
- Variations
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- Advances to The 20th Century
A theory is a tested and confirmed explanation for observations or phenomena that is supported by a large body of evidence. Science may be better defined as fields of study that attempt to comprehend the nature of the universe.
Biology is the science of life. All living organisms share several key properties such as order, sensitivity or response to stimuli, reproduction, adaptation, growth and development, regulation, homeostasis, and energy processing.
- Cells and Organization
- Metabolism
- Environmental Adaptation
- Homeostasis
- Growth and Development
- Reproduction
- Evolution
- Reference
Cells are the basic unit of life. The smallest organism consists of one cell. Within that cell is the cellular equivalent of organs, called organelles. Organelles are made of molecules or macromolecules such as carbohydrates, lipids, proteins, and nucleic acids. These organelles serve different functions including transferring ribonucleic acid (RNA...
Organisms must acquire and use energy in order to maintain their complex, living systems. Cells metabolize molecules, such as nutrients, to produce energy and use it for other processes, like replicating deoxyribonucleic acid (DNA). Some organisms, including plants and some bacteria, can convert light energy to produce nutrients. This is called pho...
Organisms must be able to adapt to their changing environments. For example, during the season when the sun is directly overhead, plants will grow upward, but they will grow more toward the side during those seasons when the sun is lower in the sky. Horses shed their coats in the spring and summer to allow for easier cooling during the warmer weath...
Organisms must maintain an internal environment that is conducive to cell metabolism. For example, humans must maintain a specific body temperature. When they are cold, they will shiver, a response that causes the muscles to produce more heat. When they are too warm, the body will produce sweat which carries heat away from the body when it evaporat...
All organisms undergo a process of growth and development. Single-celled organisms start as smaller cells that grow. The contents of the cell may become more diverse and complex. More complex organisms, such as humans, start out as a single cell that divides to create more cells. These new cells differentiate to develop into specialized cells that ...
All living organisms have DNA, which is genetic material containing the information and instructions for forming an organism. All organisms die and must be able to pass this genetic material on to create more organisms. This is done through reproduction. Single-celled organisms may divide in half and grow. Other organisms reproduce sexually, a proc...
The book, Biology, by Robert J. Brooker, et al., defines biological evolution as “the phenomenon that populations of organisms change over the course of many generations.” This can include the beak length and shape of a particular species of bird that is better suited to acquiring certain kinds of food in a particular environment. The characteristi...
Brooker, Robert J., Widmaier, Eric P., Graham, Linda E., and Stiling, Peter D. Biology. New York: McGraw-Hill, 2008.
Sep 3, 2024 · The several branches of science that reveal the common historical, functional, and chemical basis of the evolution of all life include electron microscopy, genetics, paleobiology (including paleontology), and molecular biology.
Oct 31, 2023 · All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.
What makes something living? All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, adaptation, growth and development, homeostasis, energy processing, and evolution. When viewed together, these characteristics serve to define life.
