Reusing a pipet tip when transferring controls and samples from tubes to wells A. is unlikely to cause false negatives or false positives.
B. is more likely to cause false positives than false negatives.
C. is more likely to cause false negatives than false positives.
D. is likely to cause both false positives and false negatives.

D is likely to cause both false positives and false negatives

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a