Because evolution itself is a very slow process. Having said that, the chance of having a continuum of various animals would mean that evolution would have progressed very fast. Because evolution is slow, different species establish themselves for different ecological niches and environments, this enables them to become better through time at a certain environment which then leads to eventual diversification in the number of species.
Transpiration is the process in which moisture is carried through plants from roots to little pores on the bottom of leaves, where it changes to vapor and is discharged to the atmosphere<span>.
</span>Leaf surfaces are dotted with pores called stomata.<span> It is a tiny opening or pore that is used for gas exchange. They are mostly found on the under-surface of plant leaves.</span>
Answer: Gas giants are larger, have more moons, and are less dense. They also are outer planets. Terrestrial planets are more dense, have a rocky and hard surface, and less moons sometimes no moons. They are called the inner planets.
