Which one of these is not a property of Antigen?

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#Question id: 18079

#XL - S Microbiology

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? 

1. Sporophyte embryo 2. female gametophyte 

3. egg cell                 4. megaspore 

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#Question id: 18080

#XL - S Microbiology

The following are all adaptations to life on land except

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#Question id: 18080

#XL - T Zoology

The following are all adaptations to life on land except

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#Question id: 18222

#XL - S Microbiology

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial? 

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#Question id: 18230

#XL - S Microbiology

Although PCR and replication show resemblances, but the basic difference is

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#Question id: 18231

#XL - S Microbiology

A DNA sample having mass 1 picogram undergoes PCR, the eluted DNA is weighted about 1 microgram, the minimum number of cycles required