Q: Lampreys use their sucker to feed on what part of other fish species?


Read this paragraph and choose the correct option from the provided answers:

Viruses are classified on the basis of several traits. For example, they may be classified by capsid shape, presence or absence of an envelope, and type of nucleic acid. Most systems of classifying viruses identify at least 20 virus families. Table below shows four examples of virus families and their traits. Have any of these viruses made you sick?.

 Choices:

- heart

- brain

- liver

- blood


A:
blood