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SKYBLUE1015
01.08.2019 •
Biology
Termites eat wood, but many do not produce enzymes themselves that will digest the cellulose in the wood. instead, some termites house a complex community of protozoa, bacteria, and archaea that could digest the cellulose. imagine an experiment that fed termites either wood only or wood and antibiotics, and then measured the amount of energy extracted from the wood. if both groups gained equal amounts of energy, which of the conclusions is the most logical
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Ответ:
Antibiotics only affect bacteria and so would leave the protozoa and the archaea in the gut of the termites. Both groups received the same amount of energy at the end of the experiment so it means that digestion is aided by either the protozoa or archaea and not bacteria.
Ответ:
The correct answer will be option-D.
Explanation:
Magnesium is a macro-nutrient element needed by the plant in high concentration as it is involved in the formation of chlorophyll structure, the cell membrane stabilization and the metabolism of carbohydrates.
The magnesium is absorbed from the soil as Mg ⁺² ions due to the differences in the concentration of the ions between the soil and plants. The main mechanism for absorption of these ions is passive diffusion which leads the movement of ions from low concentration to high concentration.
In the given question which states that if magnesium concentration is higher in the root hair cells than in the soil then these ions will move in the roots via special mechanism through transport proteins which require energy in the form of ATP to lead the movement of ions against a concentration gradient. This movement of ions is known as active transport.
Thus, option- D is the correct answer.