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Botanical Terms - adaptive breakthrough
A shift in the course of evolution brought about by the adoption of a unique adaptation that allows a population or taxon to shift from one compatible zone to another. Such movements could, at their most extreme, be from air to land or from sea to land.
A shift in the course of evolution brought about by the adoption of a unique adaptation that allows a population or taxon to shift from one compatible zone to another. Such movements could, at their most extreme, be from air to land or from sea to land.
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Botanical Terms - adaptive pathway
a sequence of tiny adaptive steps as opposed to one big one that allows one to pass an environmental and adaptive threshold and enter a new adaptive zone. Small adjustments add up over time to make the organism essentially pre-adapted to the new environment
a sequence of tiny adaptive steps as opposed to one big one that allows one to pass an environmental and adaptive threshold and enter a new adaptive zone. Small adjustments add up over time to make the organism essentially pre-adapted to the new environment
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Botanical Terms -actual evapotranspiration (AE)
The amount of water that evaporates from the surface and is transpired by plants if the total amount of water is limited
The amount of water that evaporates from the surface and is transpired by plants if the total amount of water is limited
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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 -activation energy (energy of activation)
The energy that must be delivered to a system in order to increase the incidence within it of reactive molecules, thus initiating a reaction. The fact that *enzymes significantly reduce the activation energy of numerous metabolic processes is a crucial characteristic.
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The energy that must be delivered to a system in order to increase the incidence within it of reactive molecules, thus initiating a reaction. The fact that *enzymes significantly reduce the activation energy of numerous metabolic processes is a crucial characteristic.
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Botanical Terms - Actinotus (*Apiaceae family)
a genus believed to have connected the evolution of cosmopolitan genera to indigenous Australian Apiaceae genera. Often called "flannel flowers," the majority of the genus's species are *biennial herbs that grow in arid and low-fertility locations. Australia is home to 17 species, while New Zealand is home to one
a genus believed to have connected the evolution of cosmopolitan genera to indigenous Australian Apiaceae genera. Often called "flannel flowers," the majority of the genus's species are *biennial herbs that grow in arid and low-fertility locations. Australia is home to 17 species, while New Zealand is home to one
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Botanical Terms – Actinostrobus
Actinostrobus (family *Cupressaceae, section *Coniferophyta)
a genus of two species of trees found as *emergents on sands and heaths in the south and west of Australia, native to the region's southwest. The swamp cypress, or A. pyramidalis, is a pyramid-shaped conifer that can grow to a height of 4 m. Its dense, vivid green foliage reaches the ground. It is raised.
Actinostrobus (family *Cupressaceae, section *Coniferophyta)
a genus of two species of trees found as *emergents on sands and heaths in the south and west of Australia, native to the region's southwest. The swamp cypress, or A. pyramidalis, is a pyramid-shaped conifer that can grow to a height of 4 m. Its dense, vivid green foliage reaches the ground. It is raised.
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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
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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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otanical Terms -Acrodromous
used to describe a kind of vein in a palmate leaf where two or more secondary veins converge at the apex of an arch.
used to describe a kind of vein in a palmate leaf where two or more secondary veins converge at the apex of an arch.
