Answer:
D) the soil components remained for plants to grow.
Explanation:
The soil components that is remained after the removal of the forest provides a nutritive medium for the faster growth of plants. The faster rate of secondary secession occurs due to the presence of nutrients in the soil which ultimately increases the growth of the plants. The soil components has roots, seeds and other biotic organisms of the previous plants that is decomposed by the decomposers and provides nutrients to the plants.
Primary structure, which is simply the sequence of amino acids in a polypeptide molecule.
To make Paramecium Contractile vacuole concentration graph useful the salt concentrations descriptions should replaced with actual values.
Thus, option "A" is correct.
What is Paramecium Contractile vacuole
"It is a sub-cellular structure (organelle) involved in osmoregulation."
<h3>What is a graph?</h3>
"A diagram (such as a series of one or more points, lines, line segments, curves, or areas) that represents the variation of a variable in comparison with that of one or more other variables."
<h3>What does the graph in the given question depict?</h3>
It shows that the Paramecium Contractile Vacuole concentration per minute decreases as salt concentration increases.
But the concentration of salt is not mention in quantity so its not clear what are the lowest and highest concentration affecting Paramecium Contractile Vacuole.
Hence, the Paramecium Contractile Vacuole concentration graph can be more useful if the actual values of salt concentration will be mentioned.
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If your asking where Most people in cities get there water.
Then the answer is by delivery through pipes.