Several years ago, fish from asia were introduced into ponds in the united states. they have rapidly grown in numbers and use up a lot of the food and habitats of other fish that are natural to the united states. this is an example of which factor that affects biodiversity?

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall