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In this context, tradeoffs refer to the process through which a trait increases in fitness at the expense of decreased fitness in another trait. A much agreed-on theory on what causes evolutionary tradeoffs is that due to resource limitations (e.g. energy, habitat/space, time) the simultaneous optimization of two traits cannot be achieved ...
Chaos is a genus of single-celled amoeboid organisms in the family Amoebidae.The largest and most-known species, the so-called "giant amoeba" (Chaos carolinensis), can reach lengths up to 5 mm, although most specimens fall between 1 and 3 mm. [3] [4] [5]
Gromia sphaerica is a large spherical testate amoeba, a single-celled eukaryotic organism and the largest of its genus, Gromia. The genus itself contains about 13 known species, 3 of which were discovered as late as 2005. [1] It was discovered in 2000, along the Oman margin of the Arabian Sea, at depths around 1,163 to 1,194 meters (3,816 to ...
Amoebozoa of the free living genus Acanthamoeba and the social amoeba genus Dictyostelium are single celled eukaryotic organisms that feed on bacteria, fungi, and algae through phagocytosis, with digestion occurring in phagolysosomes. Amoebozoa are present in most terrestrial ecosystems including soil and freshwater. [1]
The single-celled giant amoeba has up to 1000 nuclei and reaches lengths of 5 mm. Gromia sphaerica is a large spherical testate amoeba which makes mud trails. Its diameter is up to 3.8 cm. [ 116 ]
The inclusive fitness of an individual w i is the sum of its specific fitness of itself a i plus the specific fitness of each and every relative weighted by the degree of relatedness which equates to the summation of all r j *b j..... where r j is relatedness of a specific relative and b j is that specific relative's fitness – producing:
The amoeba moves towards the signal. The amoeba secretes more cAMP to boost the signal. The effect of this is to relay the signal throughout the nearby population of amoebae and cause inward movement to the area of highest cAMP concentration. Within an individual cell, the mechanism is as follows:
The best possible allocation of resources is what allows an organism to achieve an optimal life history strategy and obtain the maximum level of fitness, [9] and making the best possible choices about how to allocate energy to various trade-offs contributes to this.