Answer:
____________
10) botanists .
____________________
11) ecologists.
_____________________
12) geneticists.
_____________________
13) agronomists.
_____________________
14) zoologists.
_____________________
15) entomologists (not just insects, but "bugs"; and terrestrial arthropologists as well - look up the definition of "insect").
_____________________
16) paleontologists.
___________________
17) anthropologists.
___________________
18) marine biologists. (also, look up "limnologists"/ limnology).
___________________
