Answer:
The answer is both the first (Cause disease) and second (Cause algal blooms)
Explanation:
Protists may cause disease and even kill living things. Also, algal blooms are essentially protists but have chloroplasts- which plays a part in them being harmful.
This might be wrong but I think it’s B
Answer:
we would have to kill ourselves cause were invasive
Explanation:
<span>they maintain the integrity of the cell membrane </span>