Answer:
Prokaryotic single-celled organisms.
Explanation:
even though many debate on this. the earliest forms of like pretty much began with bacteria. During the Precambrian Timespan most life was composed of these single celled organisms.
The nurse is performing disability assessment.
Disability assessment is a component of the primary survey, which is performed to evaluate the consciousness level, which may get affected due to a neurologic injury. In the mnemonic AVPU, the A indicates alert, V indicates a response to voice, P indicates a response to pain, and U indicates unresponsiveness.
They are called the vena cava.