Answer:
missing - biostatics
Explanation:
Longitudinal studies differ from one-off, or cross-sectional, studies. The main difference is that cross-sectional studies interview a fresh sample of people each time they are carried out, whereas longitudinal studies follow the same sample of people over time.
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The main reason for the species extinction is for the ecological changes.
Cell Membrane = Controls what comes into and out of a cell; found in plant and animal cells
Answer: Slow, long lasting, widespread responses