www.britannica.com/science/adaptation-biology-and-physiology#:~:text=Adaptation, in biology, the process by which a,’s acting upon heritable variation over several generations.
- Adaptation, in biology, the process by which a species becomes fitted to its environment; it is the result of natural selection ’s acting upon heritable variation over several generations.
People also ask
What is an organism adaptation?
When does sensory adaptation occur?
What is the scientific definition for adaptation?
What is an adaptation to the environment?
Adaptation, in biology, the process by which a species becomes fitted to its environment; it is the result of natural selection ’s acting upon heritable variation over several generations. Organisms are adapted to their environments in a great variety of ways: in their structure, physiology, and genetics, in their locomotion or dispersal, in their means of defense and attack, in their reproduction and development, and in other respects.
Jun 07, 2019 · In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. Although scientists discussed adaptation prior to the 1800s, it was not until then that Charles Darwin and Alfred Russel Wallace developed the theory of natural selection.
The adjustment of an organism, including man, in part or in whole, to changes in environment or to external stress. Adaptation is an essential feature of all living things and the likelihood of survival often depends on how effectively it operates. Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005.
- Adaptations and Adaptability
- Human Genetic Adaptations and Human Variation
Humans have biological plasticity, or an ability to adapt biologically to our environment. An adaptation is any variation that can increase one’s biological fitness in a specific environment; more simply it is the successful interaction of a population with its environment. Adaptations may be biological or cultural in nature. Biological adaptations vary in their length of time, anywhere from a few seconds for a reflex to a lifetime for developmental acclimatization or genetics. The biological changes that occur within an individual’s lifetime are also referred to as functional adaptations. What type of adaptation is activated often depends on the severity and duration of stressorsin the environment. A stressor is anything that disrupts homeostasis, which is a “condition of balance, or stability, within a biological system…” (Jurmain et al 2013: 322). Stressors can be abiotic, e.g., climate or high altitude, biotic, e.g., disease, or social, e.g., war and psychological stress. Cultur...
Click on this link to watch a fantastic video explaining the interplay of skin color, UV, and vitamin D.
Technically, a race is a biologically classifiable subspecies. So, when we are asking, “Do human races exist?”, what we’re really asking is, “Are there biologically classifiable subspecies in humans?”. Here’s the American Anthropological Association’s statement on race and the American Association of Physical Anthropologists statement on race. What are they saying? Basically: 1. race is an arbitrary categorization, races are not biologically distinct groups (in other words, race is a cultural construct, not a biological one) 2. while groups of people who have lived together for a long time may have some alleles in common (for example, those that code for skin color or hair color), there is more genetic variation within races than there is between races 3. the concept of race has historically been a tool that some people use to subjugate others Further explore the concept of race, its history, and human variation.
Jurmain R, Kilgore L, Trevathan W. Essentials of physical anthropology, 4th edition. Belmont (CA): Wadsworth, Cengage Learning; 2013. 437 p. Larsen CS. Our origins: discovering physical anthropology. New York (NY): W.W Norton& Company, Inc.; 2008. 430 p. O’Neil D. Human biological adaptability: an introduction to human responses to common environmental stresses [Internet]. c1998-2013; [cited 2015 June 1]. Available from . Yoshida-Levine B. Human variation and adaptation [Internet]. El Cajon (CA): Grossmont College; c2015 [cited 2015 June 1]. Available from .
Adaptations are well fitted to their function and are produced by natural selection. Adaptations can take many forms: a behavior that allows better evasion of predators, a protein that functions better at body temperature, or an anatomical feature that allows the organism to access a valuable new resource — all of these might be adaptations.
In human intelligence …psychologists have generally agreed that adaptation to the environment is the key to understanding both what intelligence is and what it does. Such adaptation may occur in a variety of settings: a student in school learns the material he needs to know in order to do well in a course;…
Literary adaptation is the adapting of a literary source (e.g. a novel, short story, poem) to another genre or medium, such as a film, stage play, or video game. It can also involve adapting the same literary work in the same genre or medium just for different purposes, e.g. to work with a smaller cast, in a smaller venue (or on the road), or for a different demographic group (such as adapting a story for children).
Feb 06, 2018 · Individual Adaptations as a Catalyst for Evolution This isn't to say that these individual adaptations do not play a role in the process of evolution within a population—in fact, mutations that benefit certain individuals may result in that individual being more desirable for mating, increasing the likelihood of that particular beneficial genetic trait in the collective gene pool of the population.