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Propagule pressure plays an important role in species invasions (Groom, 2006). Charles Darwin was the first to study specific factors related to invasions of non-native species. In his research he identified that few members of the same genus were present in habitats containing naturalized non-indigenous species (Colautti et al., 2006).
Two adult red wolves groom a juvenile. A male cat grooms a female kitten. Social grooming is a behavior in which social animals, including humans, clean or maintain one another's bodies or appearances. A related term, allogrooming, indicates social grooming between members of the same species
The 3 core sciences namely Biology, Chemistry, and Physics will be updated for first teaching in August 2023, with first examinations in May 2025. The syllabus change was originally scheduled for 2021, though the COVID-19 pandemic caused the IB to delay the syllabus change to 2023. Details of the specific changes can be found on the IBO website.
There are several models of the Branching order of bacterial phyla, one of these was proposed in 2006 by Ciccarelli et al. for their iTOL project. [1]This tree is based on a concatenated set of conserved protein and not 16S rRNA (cf. Branching order of bacterial phyla (Woese, 1987)).
Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576 (2013), was a Supreme Court case, which decided that "a naturally occurring DNA segment is a product of nature and not patent eligible merely because it has been isolated.” [1] However, the Court allowed patenting of complementary DNA, which contains exactly the same protein-coding base pair sequence as the natural ...
Mathematical and theoretical biology, or biomathematics, is a branch of biology which employs theoretical analysis, mathematical models and abstractions of living organisms to investigate the principles that govern the structure, development and behavior of the systems, as opposed to experimental biology which deals with the conduction of ...
Phenotypic plasticity refers to some of the changes in an organism's behavior, morphology and physiology in response to a unique environment. [1] [2] Fundamental to the way in which organisms cope with environmental variation, phenotypic plasticity encompasses all types of environmentally induced changes (e.g. morphological, physiological, behavioural, phenological) that may or may not be ...
IB Film can be taken at either the standard level (SL) or higher level (HL). For both levels of IB Film, the candidate must research and write an Independent Study, do a Practical Project and give an oral presentation, based on the close analysis of a 5-minute extract from a film prescribed by the IBO.