Question

multiple choice 6.15 points primarily it is the changes in what viral structures that allow enveloped viruses like influenza to spread to new host species and new tissues? viral knobs/proteins the viral capsid proteins viral enzymes the viral envelope (membrane)

Explanation:

The viral envelope (membrane) is crucial for an enveloped virus like influenza to spread to new host species and tissues. It allows the virus to fuse with host - cell membranes, facilitating entry into new cells and tissues. The envelope contains glycoproteins that can bind to receptors on different host cells, enabling cross - species and tissue - to - tissue spread.

Answer:

The viral envelope (membrane)