Leeches are parasitic because they suck blood not giving any benifit but harm.
Either number 1 or number 3.
Bahahaha I don't even know.
sorry
Answer:
For example, addition of an orange chromic acid reagent to some compounds causes the chromium reagent to change to a blue-green color (Figure 6.37a). This is considered a "positive" test result, and in this case indicates the presence of a functional group that can be oxidized (alcohol or aldehyde).
Answer:
D. Evolutionary relationships
Explanation:
phylogeny describes the relationships of organisms which evolved on most closely related species
A picture is needed to answer.
