The oil-eating bacteria helped in the removal of Gulf oil spill, but it is not that easy in Arctic region. The Arctic waters also comprise of cold-adapted, oil-consuming microbes. Though, they function at a diminished rate of metabolism in comparison to the warm water species.
In the Arctic Ocean, the ocean currents do circulate, but over a larger surface area in comparison to the Gulf of Mexico, so it would take much more years for the bacteria to come back to the similar location. The cold temperatures also influence the nature of the oil, developing it more viscous and thicker that is tougher for the bacteria to dissociate.
An oil spill in such regions takes even longer to dissociate, as the levels of oxygen in such regions go way down and bacteria cannot live in such conditions easily.
The answer is B. The number of stomata is more on the lower surface of the leaf. The primary function of the stomata is to regulate moisture loss from the plant. The upper surface of the leaf is more exposed to the air and sunshine thus water is more susceptible to evaporation. However, the stomata is abundant on the lower surface, the location of it helps the plants to conserve more water
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unequal warming and cooling of land and sea
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Answer:
diffusion through a selectively permeable membrane
Explanation:
The cell membrane selectively allows certain substances to enter or leave a cell . This implies that cell membranes are selectively permeable; they allow some substances to pass through, but not others.
Direct transport of materials across the cell membrane is often passive. Passive transport does not require energy to occur. Passive transport is the movement of substances from a region of higher concentration to a region of lower concentration. A concentration gradient is always required.
The diffusion through a selectively permeable membrane is an example of passive transport.
The iodine moves into the dialysis tube across the semi permeable cell membrane from a region of higher concentration to a region of lower concentration in response to a concentration gradient.
DNA Complement: TCAAG
RNA Complement: UCAAG
