An algal bloom is caused by an overgrowth of algae in a lake. This decreases the amount of dissolved oxygen, leading to the death of many species of fish. What effect is this? OA direct effect
OB. indirect effect
Ос. cascading effect
OD keystone effect​

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes