Number 1. cell membrane
number 2. cytoplasm
number 3. ribosome
number 4. cell wall
number 5. nucleus
The answer is the second choice
If the medical assistant noted irregularities in the heart rate when palpating the radial pulse, they would opt to take a patients apical pulse for a full minute to make sure they are accurately counting the number of heartbeats per minute.
An organism can "make a living" and survive in its niche.