Because there are so many strains, it is hard to pin point which strain needs to be treated.
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Answer:</h2>
Strand of <u>D. DNA</u> acts a template during replication.
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Explanation:</h2>
DNA replication is the natural procedure of delivering two indistinguishable copies of DNA from one unique DNA particle. DNA replication happens in every single living life form going about as the reason for natural legacy.
During the process of replication, a template is used based upon the information contain by it, new strands are produced. Thus, the old DNA acts as template for replication with help of which new daughter strands are produced.
They are important in long term memory because they respond faster in a second infection with the same pathogen
The correct answer is option D, difficulty of redesigning workable ecosystems
Reason -
The area that was redesigned into an ecosystem actually failed to attract the endangered species of clapper rails in California because of the following two reasons –
a) Failed attempt of restoration of Cord grass ( a tree which is a dominant tree in the nesting habitat of clapper rail) . Even if few such trees were there they could not grow to their full height and thus were incapable of providing adequate nesting cover
b) Due to the lack of predatory insect, some herbivore insect in the ecosystem attacked the green grasses thereby making the nesting inadequate.
