What are the two different characteristics that scientists examine to classify living things/

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Nucleus has two lobes; contains granules of lysosomal enzymes; functions in attacking parasitic worms and plays complex roles in inflammatory diseases like allergies and asthma. what blood cells are described?

What property of water provides for appropriate sugar, salt, and amino acid levels to be present and carried in the blood of animals to be delivered to cells