Answer:
They have a closed circulatory system.
Explanation:
In an open circulatory system, blood vessels transport all fluids into a cavity. When the animal moves, the blood inside the cavity moves freely around the body in all directions.
Closed circulatory systems are different to open circulatory systems because blood never leaves the blood vessels. Instead, it is transferred from one blood vessel to another continuously without entering a cavity.
B. larger and more complex
Explanation: As the environment became more unpredictable, bigger brains helped our ancestors survive.
Asymptomatic bacteruria is when there are elevated bacteria levels in urinalysis or there is culture growth but there are no symptoms thereby asymptomatic. Although asymptomatic, asymptomatic bacteruria is a form of urinary tract infections but only needs to be treated if the urinary tract infection is symptomatic or complicated such that in pregnancy, those with unstable comorbidities such as diabetes, and those with structural anatomic urinary tract defect i.e. vesicoureteral reflux.
The correct answers are:
(1) Physical findings are absent; (2) asymptomatic; (2) if no symptoms present, no antibiotics recommended; (4) elevated bacteria level in urinalysis and culture
B. I think, because they are both mechanical. Don't quote me on that <span />
