Answer:
The correct answer is A.
Explanation:
Diffusion is the net movement of a substance from a region of higher concentration to a region of lower concentration. The difference in concentration between two environments creates a concentration gradient which is what drives diffusion. Therefore, this movement does not require aid such as extra energy molecules for active transport or integral membrane proteins for directed movement, hence the answer is not B nor C. If the cell is in equilibrium with its environment, it means that the concentration of substances inside the cell is equal to the concentration outside the cell, and any movement that takes place will be random movement of substances across the plasma memberane. Movement in the cell will not cease as the cell is still active. Therefore, the answer cannot be D either.
IV only
Plate IV will only have the trangenic E Coli hence will have the highest percentage of bacteria that are expected to produce insulin.
Explanation:
The transgenic <em>E. coli </em>will have taken up the plasmid with the insulin and <em>amp</em> genes hence they will be able to survive and grow in amplicilin antibiotic.
In plate IV, the wild type <em>E. coli</em> will be eliminated by the antibiotic (because they do not have the gene for resistance) hence providing no competition for resources, in the agar, with the transgenic <em>E coli</em>. This will ensure optimal growth for the transgenic <em>E coli</em> even, than in plate III, producing highest percentage of insulin.
Learn More:
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The direction iron in ocean rocks points
The new crust, formed at constructive/divergent boundary (regarding tectonic plate movement), has band-like patterns that orient in different directions (in alignment with earth's magnetic fields) and visible on the surface. This shows that it is newly made crust made from new magma.
Explanation:
These bands are firmed when the iron minerals in magma orient themselves with the earth's magnetic field before the magma cols into rock and lock the minerals permanently in position. This magma upwells from the mantle to fill the void made when the tectonic plates are moving away from each other.
The earth's magnetic field on the other hand is dynamic. Its angle increases gradually from the true north or south and then flips orientation over several hundred years. The iron minerals therefore will align differently depending on the orientation of the earths magnetic field at the time. This is why the new crust has band-like features visible on its surface.
Learn More:
For more on seafloor spreading check out;
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The addition of acetyl groups to histones is associated with chromatin condensation and and higher levels of gene expression
Deforestation
Factories that release carbon dioxide and other greenhouse gasses
Peat bog destruction
Burning fossil fuels
Power plants usagr
