First blank: The mobility of their hosts same goes for the second one :)
Radon and Thoron are the most significant sources of radiation exposure to people living in the United States accounting for 37% of total radiation exposure.
These are nuclides that are produced from the radioactive decay of materials especially in consumer products and through natural processes such as the decay of radium.
A) Cytoplasm because it contains a jelly-fluid called Cytoplasm... Cytoplasm fills most of the space inside the cell...