The answer is; D
This is due to the fact that temperatures of a solvent are directly proportional to the amount of solute they can dissolve. The waters at the equator get heated more than those of other latitudes due to the angle of sun rays exposure and also the duration. This means that these waters can dissolve more salts per unit volume. As the currents push the waters towards the poles, the waters become cooler and loose some of the dissolved salts by precipitation once the saturation point is reached.
Schleiden proposed what would become known as the cell theory in 1838.
Louis Pasteur contributed to the cell theory by disproving spontaneous generation. He was the first scientist to prove that cells can only form from pre-existing cells.
Rudolf Virchows most widely known scientific contribution is that he backed up Schleidens previous discovery in 1838.
Most sponges I see are some what symmertrical, but not completely. I would say that it is Translational surgery, and the soak up holes repeat them selves.
- keystone species is the correct answer.
<u>keystone species</u> which keeps the number of other animal population in
control and low in the entire ecosystem. They play an important role
through this process and helps the food chain effectively.
dominant species - most common species; found often in the ecosystem.
invasive species - which fights for itself survival and can cause harm to
ecosystem. non-native to an ecosystem