Answer:
The first heart sound (S1) represents closure of the atrioventricular (mitral and tricuspid) valves as the ventricular pressures exceed atrial pressures at the beginning of systole (point a). S1 is normally a single sound because mitral and tricuspid valve closure occurs almost simultaneously.
Explanation:
Biotechnology is used by forensic scientists to collect or process trace evidence such as hair, skin, blood or semen samples, which is found at crime scenes.
I believe the correct answer is A
Answer:
the answer is letter A. Tank
<span>A) Humans and other apes represent divergent lines of evolution from a common ancestor. I feel would be the answer that makes the most sense. </span>