Which best describes the carrying capacity of an environment? an area of a desert can support a population of 320 cactus plants. over 1,500 species of birds live in a tropical rain forest. about 500 fish in part of a river died as a result of water pollution. a vegetable garden is six feet long and 10 feet wide.

An area of a desert can support a population of 320 cactus plants.

Explanation:

The carrying capacity of an ecosystem can be define as the maximum number of individuals of the population of the species that an ecosystem can support on the basis of availability of resources such as water, food, habitat and other resources. When the population of a species in an ecosystem exceeds the carrying capacity of an ecosystem then population will decline as the ecosystem will not support increase in such growth.

According to the above information, An area of a desert can support a population of 320 cactus plants is the correct option.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."