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Biology is the overall natural science that studies life, with the other life sciences as its sub-disciplines. Some life sciences focus on a specific type of organism. For example, zoology is the study of animals, while botany is the study of plants. Other life sciences focus on aspects common to all or many life forms, such as anatomy and ...
A phylogenetic tree based on rRNA data, emphasizing the separation of bacteria, archaea, and eukarya as proposed by Carl Woese et al. in 1990, [1] with the hypothetical last universal common ancestor The three-domain system is a taxonomic classification system that groups all cellular life into three domains , namely Archaea , Bacteria and ...
[10] Underlying Hurd's call was the idea "that some mastery of science is essential preparation for modern life." [ 9 ] Initial definitions of science literacy included elaborations of the content that people should understand, often following somewhat traditional lines ( biology , chemistry , physics ).
A revision of the known material assigned to the genus Haplocanthosaurus is published by Boisvert et al. (2025). [34] Fossil material of lithostrotian titanosaurs assigned to two morphotypes, including caudal vertebrae preserved with rare pathological features, is described from the Upper Cretaceous Cambambe Basin by Lacerda et al. (2025). [35]
The Centre for Innovation in Mathematics Teaching (CIMT) [23] has online course notes for these sets of topics. [24] Revision notes for an existing qualification [ 25 ] indicate a similar coverage.
The tree of life or universal tree of life is a metaphor, conceptual model, and research tool used to explore the evolution of life and describe the relationships between organisms, both living and extinct, as described in a famous passage in Charles Darwin's On the Origin of Species (1859). [1]
All life on Earth—including humanity—shares a last universal common ancestor (LUCA), [9] [10] [11] which lived approximately 3.5–3.8 billion years ago. [12] The fossil record includes a progression from early biogenic graphite [ 13 ] to microbial mat fossils [ 14 ] [ 15 ] [ 16 ] to fossilised multicellular organisms .
Although a common classroom experiment is often explained this way, [442] Bernoulli's principle only applies within a flow field, and the air above and below the paper is in different flow fields. [443] The paper rises because the air follows the curve of the paper and a curved streamline will develop pressure differences perpendicular to the ...