A comet called Nishimura discovered just a month ago could be visible to the naked eye this weekend, offering stargazers a once-in-a-437-year chance to observe the celestial visitor.
Space Exploration
Sep 6, 2023
0
14654
Glacial cyclicity of the Earth has often been considered on 100,000 year timescales, particularly for the Late Pleistocene (~11,700 to 129,000 years ago) swapping between periods of extensive polar and mountain glacier ice ...
Using geological samples from the Ythan Estuary in Scotland, scientists have identified a melting ice sheet as the probable trigger of a major climate-change event just over 8,000 years ago.
Earth Sciences
Sep 14, 2023
9
101
An emerging system which combines rapid imaging with artificial intelligence could help scientists build a comprehensive picture of present and historic environmental change—by swiftly and accurately analyzing pollen.
Molecular & Computational biology
Sep 7, 2023
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76
Though human-made ponds both sequester and release greenhouse gases, when added up, they may be net emitters, according to two related studies by Cornell researchers.
Earth Sciences
Sep 19, 2023
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88
The Japan Trench is located on the "Pacific Ring of Fire," a region of special interest in earthquake and deep-water research.
Earth Sciences
Sep 11, 2023
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26
New research is challenging the scientific status quo on the limits of the nuclear chart in hot stellar environments where temperatures reach billions of degrees Celsius.
General Physics
Sep 18, 2023
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53
The media reporting around heat waves that have hammered the northern hemisphere has been unequivocal: the simultaneous record-breaking heat has "pushed the limits of human survival."
Environment
Aug 27, 2023
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26
Mussels are among the ultimate superfoods, high in vitamin B12, omega-3 and great for the heart. Now, new research shows they are also likely to withstand marine heat waves by adjusting their body functions.
Plants & Animals
Sep 21, 2023
0
71
In work published in Science Advances, a team of researchers have determined a new pressure scale, which is critical for understanding the Earth's composition.
Earth Sciences
Sep 11, 2023
0
1
Eudicots and Eudicotyledons are botanical terms introduced by Doyle & Hotton (1991) to refer to a monophyletic group of flowering plants that had been called tricolpates or non-Magnoliid dicots by previous authors. The term means, literally, "true dicotyledons" as it contains the majority of plants that have been considered dicotyledons and have typical dicotyledonous characters. The term "eudicots" has been widely adopted to refer to one of the two largest clades of angiosperms (constituting over 70% of angiosperm species), monocots being the other. The remaining dicots are sometimes referred to as paleodicots but this term has not been widely adopted as it does not refer to a monophyletic group.
A large number of familiar plants are eudicots. A few are forget-me-not, cabbage, apple, dandelion, buttercup, maple and macadamia.
Another name for the eudicots is tricolpates, a name which refers to the structure of the pollen. The group has tricolpate pollen, or forms derived from it. These pollen have three or more pores set in furrows called colpi. In contrast, most of the other seed plants (that is the gymnosperms, the monocots and the paleodicots) produce monosulcate pollen, with a single pore set in a differently oriented groove called the sulcus. The name "tricolpates" is preferred by some botanists in order to avoid confusion with the dicots, a non-monophyletic group (Judd & Olmstead 2004).
The name eudicots (plural) is used in the APG system, of 1998, and APG II system, of 2003, for classification of angiosperms. It is applied to a clade, a monophyletic group, which includes most of the (former) dicotyledons.
This text uses material from Wikipedia, licensed under CC BY-SA
