1- B
2-B
3-C
4-B
5-A
6-A
I cant see the options for question 7, but here are the answers for 1-6. Hope they help!
I believe it is class, because species are divided into different classes, but families, for example: there's the cat family, and there's the dog family. classes: the carnivores, herbivores, omnivores OR mammals, egg laying, or hermaphrodites
I might be incorrect, but from what I remember it should be particle size
Answer & explanation:
Non-native species may be animals, plants or microorganisms introduced into an ecosystem of which they are not originally part, but where they adapt and come to dominate, harming natural processes and native organisms.
When a new species is introduced into an environment other than its own, it may compete with others, prey heavily on some species, over-breed and even cause disease.
Therefore, it can be concluded that this action may cause the destruction of some species, directly affecting the balance of that ecosystem.