In order to produce an effective immune response within the body, the person must be injected with a dosage of a virus or bacteria, and for it to be allowed to grow in the person, which replicates just enough to stimulate a response from the immune system.
Answer:
Plants can't use N2 as is so the first option is wrong. They do have relationships with bacteria that live in nodules of the root and convert the nitrogen into ammonia, a usable form for the plants. So the second option is correct. There are bacteria living in the soil as well that convert nitrogen to ammonia so technically option 3 is also correct. Again, nitrogen if present in water would be in the form N2 which is not usable by plants so 4 is wrong.
These are correct:
use bacteria to convert nitrogen to usable form
In obtain usable nitrogen compounds from the soil
400 metres. There are 1,000 metres in a kilometre.
Answer:
A
Explanation:
Succession is natural process resulting in the existence of a new species from a parent species, differing in some characterisrics native to the parents (mostly enhanced differences). It often defines a natural selective process, in that such enhancements of characteristics maybe elude some members(geni) of the species in question or distributed randomly among the species.
Answer:
<h2><u>Operational Definition</u></h2>
Explanation:
the process of clearly identifying how a variable is measured is referred to as Operational Definition
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