It would be considered E
Since
Parasitism is when one be benifits at the others harm, normally has a host and parasite. Like a tic and dog. The tic is the parasite and the dog is the host
Competition is when two animals fight for prey, territory, or mates. Like when two male lions fight to prove strength and the winner leads the pack while the other is kicked out and must go find there own pack
Mutualism is is when two animals are counted as mutuals. Like the alpha male and female that believe they are equals
Predation is when one animal eats another it normally has a prey and a predator Like the cat and the mouse. The mouse is the prey and the cat is the predator
Commensalism two animals live peacefully in the same habitat. Like the cow and the cowbird both love in harmony
Organisms adapt to their changing environment. When there is some pressure in the environment (for example, increased competition for food), then species with the most advantageous adaptations will survive. Because environments change pretty frequently, the organisms living there must cope with this change. This leads to ever changing and evolving species and increased biodiversity. Lastly, a high level of biodiversity leads to a healthy ecosystem because of the vast variety of organisms in that space. Many species allows niches to overlap and therefore no one organism occupies one niche.
Answer:
Nitrifying bacteria such as Nitrosomonas play an important role in providing nitrogen to plants and limiting carbon dioxide fixation. They are found widely distributed in soil or water, where there are large amounts of ammonia, such as lakes or streams into which treated and untreated sewage is pumped.
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The name comes from a latin word meaning to glue or bind together. DNA ligase catalyses the joining of DNA fragments (usually those produced by restriction enzymes). Thus different genes can be put into vectors and moved into other hosts.