The first option is correct (invasive species are harmful to biodiversity not beneficial)
Gill are typically outgrowths of tissue or clustered strands of filaments.
Any organ (in aquatic animals) that exchanges gases and other dissolved substances between the blood and surrounding water have typically outgrowths of tissues or clustered strands of filaments called gill. In a fish, gill filaments are present.
Answer:
It is rich in nutrients necessary for basic plant nourishment.
Explanation:
This includes nitrogen, phosphorus and potassium. It consists of adequate minerals such as boron, chlorine, cobalt, copper, iron, manganese, magnesium, molybdenum, sulphur and zinc.
Next come organisms that eat the autotrophs; these organisms are called herbivores or primary consumers -- an example is a rabbit that eats grass. The next link in the chain is animals that eat herbivores - these are called secondary consumers -- an example is a snake that eat rabbits.