Question

what is the green stuff that will grow on the sides of an unclean aquarium?
select one:
a. diatoms
b. algae
c. dinoflagellates

in what zone is found in deep water?
select one:
a. abyssal zone
b. intertidal zone
c. lentic zone

Explanation:

For the first question: Algae are photosynthetic organisms that thrive in nutrient-rich, unclean aquarium environments, forming green growth on surfaces. Diatoms are a type of algae but the general term for this green aquarium growth is algae, and dinoflagellates are not the typical green growth in aquariums.
For the second question: The Abyssal Zone is a deep ocean zone, while the Intertidal Zone is the shoreline area between high and low tides, and the Lentic Zone refers to still freshwater like lakes, not deep ocean water.

Answer:

1. b. algae
2. a. Abyssal Zone