Threshold trait
A trait that falls into natural groups that originate not in categorically distinct causes but in whether or not the outcome attains critical values; e.g., gallstones may result from a categorical cause or from unusual levels of causal factors that themselves show no evidence of grouping.
Synonym: liminal trait.
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you will find the basic structure of a neuron, the different classes of neurons, and membrane potentials. It also includes the structure of the nervous system...
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene pools have adapted in order for long term survival via their offspring. See this tutorial for more elaborate info on natural selection as exemplified by Darwin's finches...
In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patterns. Examples are incomplete dominance and complete dominance...
There are more species of insects than any other species combined. This surely illustrates that insects have the selective advantages that allow them to take the most advantage of the environment that they live in. Read more about the evolution of insects in this tutorial. Find out the reasons as to why insects enjoyed their continued existence over such a long period of time...
The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the different parts of the kidneys and its role in homeostasis...
Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habitat become more suited or a better fit to their environment. It is similar to the term acclimatization in a way that both of them are processes that lead to the adjustment to a change, such..