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Julieoct Julieoct
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7 years ago
Also try this one.
A part of the hepatitis b virus is synthesized in the lab. this viral particle can b identified by the immune system as a foreign material but the viral particle is not capable of causing disease. immediately after this viral particle is injected into a human it........................... ............................. ............................. ..............

a. stimulates the production of enzymes that are able to digest the hepatitis b virus.

b. triggers the formation of antibodies that protect against the hepatitis b virus.

c. synthesizes specific hormones that provide immunity against the hepatitis b virus.
                                    or
d. breaks down key receptor molecules so that the hepatitis b virus can enter the body cells
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dattallmofo_dattallmofo_
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7 years ago
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I assume you mean more suitable for supporting wildlife - a forest system contains a range of different species of plants, insects, birds etc.  The different habitats provide different species with suitable enviroments in which to survive.

A cornfield is usually a monoculture - that is it contains only one type of plant species.  It does not provide habitat for bird species and limited habitat for animal species.  The lack of varied habitats and food sources reduces the biodiversity - i.e the number of different species living there.  High biodiversity is important for the survival of an ecosystem, as it can respond better to periods of adverse conditions (eg. drought, cold, etc.).

Also, a cornfield is harvested every year, which is disruptive to any species living there.

The answer to the second question is B.
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