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Botanical Terms -adaptive radiation
1. A sudden explosion of *evolution that led to the exploitation of a variety of *habitats and swift divergence from a single ancestral form. The word appears at several taxonomic ranks. 2. A term that several authors use as a synonym for *cladogenesis.
1. A sudden explosion of *evolution that led to the exploitation of a variety of *habitats and swift divergence from a single ancestral form. The word appears at several taxonomic ranks. 2. A term that several authors use as a synonym for *cladogenesis.
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Botanical Terms -adaptive value (fitness, fitness, and selective value according to Darwin)
The ratio of genetic benefits to drawbacks that establishes a species' (or *genotype's) propensity to endure and procreate in a certain habitat. Which people are most suited to accomplish this depends on their surroundings and the competition or fight for survival they face; the "fittest" individual (or genotype) is the one who generates the greatest number of offspring that eventually reach reproductive maturity. The "survival of the fittest" has been used to characterize this type of natural selection.
The ratio of genetic benefits to drawbacks that establishes a species' (or *genotype's) propensity to endure and procreate in a certain habitat. Which people are most suited to accomplish this depends on their surroundings and the competition or fight for survival they face; the "fittest" individual (or genotype) is the one who generates the greatest number of offspring that eventually reach reproductive maturity. The "survival of the fittest" has been used to characterize this type of natural selection.
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Botanical Terms -adelphoparasite
a parasite that usually belongs to the same family or genus and feeds on closely related animals as its host
a parasite that usually belongs to the same family or genus and feeds on closely related animals as its host
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Botanical Terms -adelphous
applied to a *androecium that has fused *filaments.
applied to a *androecium that has fused *filaments.
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Botanical Terms -Adaxial
oriented toward the axis of a surface
oriented toward the axis of a surface
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Botanical Terms -active site
The part of an *enzyme molecule that binds it to the *substrate or substrates to form an enzyme–substrate complex. The conformation is not absolute and may alter according to reaction conditions.
The part of an *enzyme molecule that binds it to the *substrate or substrates to form an enzyme–substrate complex. The conformation is not absolute and may alter according to reaction conditions.
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Botanical Terms - action spectrum
a graph showing how well certain light wavelengths support a particular photoresponse, such as *photosynthesis or *phototropism
a graph showing how well certain light wavelengths support a particular photoresponse, such as *photosynthesis or *phototropism
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Botanical Terms -active transport
The transport of substances across a membrane against a concentration gradient. Such processes use energy, the source often being the hydrolysis of *ATP.
The transport of substances across a membrane against a concentration gradient. Such processes use energy, the source often being the hydrolysis of *ATP.
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Botanical Terms - Activator
An ion of metal that works with an enzyme or its substrate to initiate a chemical reaction.
An ion of metal that works with an enzyme or its substrate to initiate a chemical reaction.
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Botanical Terms -Actinostele
a *monostele form of *protostele where the *xylem's cross-section is lobed or star-shaped
a *monostele form of *protostele where the *xylem's cross-section is lobed or star-shaped
