outgroup
In phylogenetics, a group of organisms serving as a reference and comparison to the groups being studied. Opposite of ingroup.
Results for “organism”
Ichthyological terms, not general ones.
paedomorph
An organism exhibiting paedomorphism.
pair
A male and a female organism of the same species. Also see breeding pair.
Used in 866 profiles
parasphenoid
Elongate bone located in the base of the skull in many vertebrate organisms.
Used in 7 profiles
parietal
Of, relating to, or forming the walls or part of the walls of a body part, organ, cavity, or similar structure. Often used specifically in reference to either of a pair of bones forming much of the upper cranium.
Used in 42 profiles
peat swamp forest
Type of tropical moist forest lying over a thick bed of acidic peat, over 60% of which occur in Indonesia and Malaysia. Typically contain water with very low pH (<4.0) that is stained brown due to the release of various organic compounds from the decaying peat and thus often referred to as blackwater swamps. Usually contain some permanent water but also flood seasonally. Highly biodiverse when in pristine condition, with many species found nowhere else on earth, though increasingly subjected to intensive drainage, burning and subsequent conversion to agriculture in recent decades.
Used in 89 profiles
phenology
Study of periodic events in the life cycle of organisms and their relationship with seasonal and interannual climatic changes, e.g., migration.
phenotype
The observable physical and biochemical traits of an organism, such as its behaviour, external morphology, colour pattern, phenology, etc. Influenced by both genetic and environmental factors.
Used in 7 profiles
phenotypic plasticity
Ability of an organism to change its phenotype in response to environmental change.
Used in 2 profiles
pheromone
Chemical secreted by an organism affecting the behaviour or physiology of other individuals of the same species which may function as an alarm or sexual stimulant, for example.
Used in 2 profiles
photoperiod
The duration of an organism's daily exposure to light; the period of daylight in each 24-hour cycle.
photophore
Light-emitting organ found in some fishes.
Used in 1 profile
phylogenetics
The study of evolutionary relatedness among species or other groups of organisms. May be based on morphology, molecular data, or both.
Used in 3 profiles
phylogeography
The study of the relationships between organisms and their geographical location.
piscivore
An organism that feeds on fishes.
Used in 25 profiles
planaria
Generic term applied to numerous non-parasitic flatworms of the class Turbellaria. Also a genus within that class, Planaria. Various species occur in aquaria where they're most often associated with accumulation of uneaten food or organic material and normally considered pests.
planktivore
An organism that feeds on plankton.
polymorphism
The occurrence of different forms, stages, or types in individuals or multiple organisms of the same species independent of sexual variation.
Used in 2 profiles
pore
Small opening in a surface, especially the skin, through which gases, liquids or microscopic particles are able to pass, or through which a sensory organ obtains information.
Used in 99 profiles
predatory
Preying on other organisms.
Used in 173 profiles