What characteristic of viruses places it under the category of a "non-living" entity? O a) It can be visualized only under an electron microscope.
b) It needs a host to reproduce and cannot do it independently.
O c) It cannot be crystallized into a solid substance like powder.
d) It cannot move as only living organisms exhibit mobility.

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

How does science influence the decisions made about social, economic, and political issues?