Members include leeches.

Use choanocytes to filter food.

Bonus question – Which animal has the longest penis relative to its body size?

Circulatory system is first seen in this group of animals.

Which one has spores with harpoon-like structures?

Which of the following are non-motile, multicellular, and are producers?

Fungus-like protists are all unicellular.

Which one is multicellular and can grow in both freshwater and saltwater?

Which of the following was used to devise the three-domain classification system?

The capsid of a virus is made out of ______________.