Answer:
The veins and arteries encounter differences in the pressure of the blood flow. As a consequence, these differences are seen in the composition of the vessels. The arteries encounter with a pressure wave as blood gets pumped from the heart. This can be experienced as a pulse. Due to this pressure, the arteries' walls are much thicker in comparison to those of the corresponding veins.
Thus, arteries appear to exhibit more uniform shape, they seem to be more circular in shape in comparison to veins. Veins do not encounter with the pressure waves like the arteries do. Thus, they do not require to be structurally strong. The vessels' walls of veins are thinner in comparison to arteries and do not exhibit much tunica media.
Answer:
There are more than 500 plant species found on the Galapagos, about one-third of which are endemic.
Explanation:
Endemic meaning that these plant species are native to the islands and found nowhere else in the world. There are also exclusive species of cotton, guava, passion flower, pepper and tomatoes that all grow there.
Answer:
Atp is Adenosine triphosphate an organic compound that provides energy to drive many processes in living cells. The energy is stored in the covalent bonds between phosphates.
As the earth has active tectonics we know that rocks are recycled and the oldest rocks may therefore just be the oldest rocks that have not been recycled yet. We know the true age of the earth by looking at radioactive isotopes of things like spacedust and meteors that formed at the same time as the earth as they have not been affected by the tectonic process of recycling here on Earth.
If decomposers were here then their would be a ton of waste and the dead and bacteria will pile up
