The porcupine is a rodent with an unusual trait. Porcupines have sharp spines or quills that help protect it against its predators. This trait is different from other rodents because of its needle like quills. This animal is also similar to that of a hedgehogs.
Answer:
Prepare solutions of different acid concentrations, measure 50 milliliters of each into different beakers, and place the same type of medication of the same mass into the beaker
Explanation:
The experiment to test the effect of stomach acid concentration on the solubility of a particular oral medication will have the following configuration;
The independent variable = The concentration of the acid to which the medication is added
The dependent variable = The solubility of the medication in the acid concentration
The constant = The medication which is added to the acid concentration
The controls = The fixed mass and type of the particular medication and fixed volume of the different concentrations of the acid samples.
Because it was isolated from areas since the land is protected by an ocean, deserts, and dry mountains.
Explanation:
As I think,human beings is the correct one.
Answer:
The semi-plastic rock of the mantle behaves like water being heated. The lower mantle is hotter than upper mantle because it is closer to the hotter core of the earth. Therefore, this part of the mantle is less dense and tends to rise as the upper cooler denser mantle close to the crust sink to the bottom. These convection currents are similar to those of water in a container being heated from below.
The circular motion of these currents tends to drag along the crust due to force of friction between the lower crust and upper mantle. This is what powers tectonic plate movements. When two plates are driven by currents that intersect and churn in the same direction, they collide, at a convergent boundary as shown in position D in the illustration. The denser plate is subducted beneath the other. At position E, two plates are moving away from each other (called a divergent boundary) because each plate is being driven by a different convention current in the mantle. These current are cycling in opposing directions (one clockwise the other anti-clockwise).
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