a closed circulatory system
Hearts.
closed circulatory system!! blood fluid is DISTINCT from the body cells
biosphere
vertebrata
No prokaryote cells do not have a distinct nucleus. The prokaryotes are a group of organisms whose cells lack a membrane-bound nucleus. Organisms whose cells do have a nucleus are called eukaryotes.
a. pex: it might have lived in a very wide geographic region
Because of the great diversity of organisms, there is really a need for naming them scientifically. Scientific names give a distinct identity to organisms and help avoid confusion with misleading common names.
Because entrepreneurial ability is directly engaged in production
The subphylum Vertebrata is composed of seven distinct classes of organisms, including Agnatha (jawless fish), Chondrichthyes (cartilaginous fish), Osteichthyes (bony fish), Amphibia (amphibians), Reptilia (reptiles), Aves (birds), and Mammalia (mammals).
That is true
It must be distinct from other organisms. It must have lived in a very wide geographic region
Certain bacteria and viruses carry their DNA in little rings rather than in chromosomes, so don't have a distinct nucleus like larger organisms.