They must have a list of biomes there. When they say which one is endangered they mean which one is likely to no longer exsist after an amount of time.
Pretty sure it's B. Conjugation because that is a form of sexual reproduction in the reproduction of prokaryotes.
Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils provide information about the organism that is not revealed by body fossils. Trace fossils are formed when an organism makes a mark in mud or sand.
The answer to the question stated above is non-disjunction.
