<span>Els moduladors al·lostèrics que actuen en els humans són el 2,3-Bisfosfoglicerat (2-3-BPG),el CO2
i els H+
. El 2,3-BPG s'uneix al centre del tetrà mer de l'estat T i aixà l'estabilitzà launió per interaccions iòniques. Els protons actuen perquè quan el pH és baix l'hemoglobinadisminueix la seva afinitat per l'oxigen (efecte Bohr). L'augment de la concentració del CO2
té el mateix efecte perquè el CO2 es combina en H2O i es dissocia en HCO3-i H+
i per aixòdisminueix l'afinitat de l'hemoglobina perquè augmenta la concentració de protons</span>
Weathering is wearing down objects by elements in an environment
C.) Here, only "Flatworm" has bilateral symmetry
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Answer:
B. Stabilizing selection
Explanation:
When natural selection acts against the extreme phenotypes but favors intermediate variants, it is called stabilizing selection. Stabilizing selection is mostly operative in the population s that are well adapted to the prevailing environmental conditions. Individuals with average or intermediate phenotypes are favored by stabilizing selection.
In the given example, the elk population maintains the antler size over generations. Most of the elks have intermediate-sized antlers while only a few have larger or smaller antlers. Since the average antler size (the intermediate phenotype) is favored over the extreme ones (larger or smaller sized antlers), the population is experiencing stabilizing selection.
Answer:
Tilting - Rock strata always form horizontally, so anything not horizontal has been acted upon. ... Folding - If the rocks are bent, they have been folded. Faulting - If there is a break and movement within the rocks, this is a fault.
Explanation:
