Certain organisms lack a specialized transport system for moving nutrients around the body. These organisms generally lack advanced circulatory systems.
prokaryotic cell =)
protist
Active transport
The cell lacks a membrane-covered nucleus.
granite
Sponges
prokaryotic cell =)
It lacks a backbone.
prokaryotic cell =)
An organism that's lacks a nuclear membrane. It doesn't have a true nucleus.
Prokaryote
the cytoplasm
A prokaryote.
Archaebcteria
An invertebrate lacks a vertebral column.
protist
a Prokaryote