Answer:
B
Explanation:
Valleys are created by streams of running water
First blank space is endocrine system and the second blank is hormones
A is the active site and C is the enzyme
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).
Heterotrophs, tertiary consumers and top carnivores.
