Form classification is the classification of organisms based on their morphology, which does not necessarily reflect their biological relationships. Form classification, generally restricted to palaeontology, reflects uncertainty; the goal of science is to move "form taxa" to biological taxa whose affinity is known.
I believe the answer would be B. someone correct me if I'm wrong.
A) weapons for an evolutionary arms race w/ disease causing organisms
B white blood cells function as your immune systems body guards. Osmosis Jones is a great movie to watch in order to learn more about it :)
Hag Fish and Lamprey
Vertebrates are the organism which posses a vertibral column(aka the spine or back bone structure), while the earliest had a head they lacked a spine and jaw, these jawless vertebrae lived 500-600 million years ago. they are the ancestors of bony fish which in time became amphibians and other groups of animals
