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Schematic representation of a Euglena cell with red eyespot (9) Schematic representation of a Chlamydomonas cell with chloroplast eyespot (4). The eyespot apparatus (or stigma) is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids.
"Fixed action pattern" is an ethological term describing an instinctive behavioral sequence that is highly stereotyped and species-characteristic. [1] Fixed action patterns are said to be produced by the innate releasing mechanism, a "hard-wired" neural network, in response to a sign/key stimulus or releaser.
Ecology and evolutionary biology are considered sister disciplines of the life sciences. Natural selection , life history , development , adaptation , populations , and inheritance are examples of concepts that thread equally into ecological and evolutionary theory.
Other terms in biology refer similarly to various taxa; for example: Fungi are described by their growth patterns: molds, yeasts, mushrooms and dimorphic fungi. Lichens structure is described their growth form: foliose, crustose, fruticose or gelatinous. Bryophytes structure is described as foliose or thallose.
Attempts to redefine commonly used terms in invasion biology have been difficult because many authors and biologists are particular to a favorite definition (Colautti and MacIsaac 2004). Also, the status and identification of any species as an invader, a weed, or an exotic are "conditioned by cultural and political circumstances." (Robbins 2004)
Molecular neuroscience is a branch of neuroscience that observes concepts in molecular biology applied to the nervous systems of animals. The scope of this subject covers topics such as molecular neuroanatomy, mechanisms of molecular signaling in the nervous system, the effects of genetics and epigenetics on neuronal development, and the molecular basis for neuroplasticity and ...
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population, and application of this knowledge to prevent diseases.
She is the George Barth Geller Professor of Research in Molecular Biology and Chair of the Department of Cell Biology at Duke University, as well as the director of the Duke Stem Cell Program. [163] Fred Hollows (1929–1993): New Zealand and Australian ophthalmologist. He became known for his work in restoring eyesight for countless thousands ...