Question: We classify Algae as protists, but Sponges are animals. Shouldn't Sponges be protists as well? What makes them different? Why aren't Algae plants?
Because sponges do have specialized cells. Not to mention that there is now evidence that they evolved from a much more complex animal. Next question.
We classify sponges as protists, but algae are animals. Shouldn't algae be sponges as well? What makes them sponges? Why aren't sponges algae?
Protists are eukaryotic microbes. Sponges are multicellular. Sponge embryos pass through a blastula stage which only animals do.Algae aren't considered plants because they lack the structures that qualify something as a plant.
Because they aren't.
>>346049Bam?