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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).
Students who complete two group 1 subjects (instead of a group 1 and group 2 subject), or complete a group 3 or 4 subject that is of a different language of the group 1 subject taken by the candidate, are eligible to be awarded a bilingual IB Diploma on the condition that the candidate obtains a level 3 or greater in both subjects. [2]
[43] In 2008, due to the devaluing of the A-Levels and an increase in the number of students taking the IB exams, then-Children's Secretary Ed Balls abandoned a "flagship Tony Blair pledge to allow children in all areas to study IB." Fears of a "two-tier" education system further dividing education between the rich and the poor emerged as the ...
study was conducted to determine if high fructose corn syrup contains mercury, a toxic metal historically used as an anti-microbial. High fructose corn syrup samples were collected from three different manufacturers and analyzed for total mercury. The samples were found to contain levels of mercury ranging from below a detection limit of 0.005 to
The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [1] In the experiments, Calhoun and his researchers created a series of "rat utopias" [ 2 ] – enclosed spaces where rats were given unlimited access to food and water, enabling unfettered population growth.
Using transgenic bioluminescence, Thain et al. discovered that the two leaves were out of phase with each other, displaying peaks in luminescence at opposite times. This provided evidence for the notion that each cotyledon is sufficient for maintaining an independent circadian rhythm and has its own autonomous circadian oscillator.
A 2016 study by Kumar et al. [13] chemically analyzed these secretions, concluding that they may be required in chemosensory mediated communication [14] and mate choice. Similarly, in the less aggressive herb-field mouse, males are observed to groom females for longer durations and even allow females to not reciprocate. [15]
Advanced Placement (AP) Biology (also known as AP Bio) is an Advanced Placement biology course and exam offered by the College Board in the United States. For the 2012–2013 school year, the College Board unveiled a new curriculum with a greater focus on "scientific practices".