Answer:
I did not watch the video
Explanation:
Answer:
c. parasite
Explanation:
the barnacle benefits from the host while the host is harmed from the barnacle
The dependent variable in an experiment could be formally called the cause while the independent could be called the effect.
Answer:
I want to say it is the middle layer. But not 100% sure. Sorry if its wrong.
Answer - Cyanobacteria aka Algae that contributed in creating O2 for the atmosphere as a byproduct thru Photosynthetic.
Reason - Of course Algae make up mainly the whole world in waters and they do photosynthesis to give off oxygen in the atmosphere.
