<span>It may be difficult for ecologists to determine the size of a bird population if that population migrates to different locations throughout the year. During migration, some birds may split off from the group and not return, others may die, and still others may join. Therefore, the bird population will be in constant flux. It is hard to know, when the birds return to their prior location, if the population consists of the same group of birds (in addition to deaths and births) or whether it has grown or shrank through other means. However, to estimate the size, an ecologist can track a migratory flock through several years, counting each year to get a general sense of the population size. Additionally, given one measurement, an ecologist could consider the average lifespan and birth rates of the population to extrapolate the size of the population in subsequent years.</span>
The last one is false, the plates are almost always moving
Answer:
Oils repel water, so it helps these animals keep their fur dry, which helps them stay warm.
Answer:
A hamster is a primary consumer because it feeds on primary producers (plants).
In cells, hydrogen peroxide is converted to water and oxygen through the activity of
<span>= ENZYMES</span>
