The phoenix area of the southwestern desert typically receives 8 inches of precipitation yearly, in two seasonal patterns. even though it is an arid region, it has high biological diversity. thin-leaf trees abound, such as palo verde and desert ironwoods. wide varieties of cactus thrive, including the cholla, p-r-i-c-k-l-y pear, and saguaro. wildlife includes insects, reptiles, many bird species, small rodents, and other mammals. which element in the southwestern desert ecosystem is abiotic?

a. populations can have negative effects on their environment.
b. populations can affect the size of other populations.
c. populations have no effect on their environment.
d. populations can adapt to changes in the environment.

Which figures of speech appear in this excerpt from john keats’s “ ode to autumn “?

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

What pattern of migration do whales follow?