Crossing over is an event during mciosis that dramatically increases variation in offspring. This event occurs between what structures?
a. Chiasma
b. Sister chromatids
C. Nonhomologous chromosomes
d. Nonsister chromatids

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

yes, because even though a theory has a  lot of evidence to support it, it is not always true