What determines the shape of the capsid or core of a virus?

The amount and arrangement of the proteins and nucleic acid of viruses determine their size and shape. The protein and nucleic acid constituents have properties unique for each class of virus; when assembled, they determine the size and shape of the virus for that specific class. The capsid ensures the virus gets delivered into the host, thereby allowing the virus to continue on. This shows the capsid of the Adenovirus. This capsid is called an icosahedral shape. This is one of the more complex types of capsid.

Explanation:

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explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.