Question

multiple choice question
all animal phyla have their origins in ______ ancestors.

○ fungal
○ algal
○ aquatic
○ terrestrial

Explanation:

The earliest animals evolved in water. The first animals were simple, aquatic organisms. Over time, some animals adapted to life on land, but all animal phyla trace their origins back to aquatic ancestors. Fungal ancestors are not the origin of animal phyla. Algal ancestors are related to plants (in some cases), not animals. Terrestrial ancestors came after the initial aquatic phase of animal evolution.

Answer:

aquatic