Question

symbiodinium are a type of________
angiosperm
dioflagellate
diatom
spore
________are a type of emergent plant that create excellent habitats for small organisms.
mangroves
salt - marsh plants
diatoms
seagrasses

Explanation:

Symbiodinium is a genus of dinoflagellates. Dinoflagellates are a type of protist. Angiosperms are flowering plants. Diatoms are a major group of algae. Spores are reproductive units.

Mangroves are emergent plants (trees or shrubs) that grow in coastal saline or brackish water. They provide habitats for many small organisms. Salt - marsh plants are also in coastal areas but are usually herbaceous. Diatoms are microscopic algae. Seagrasses are submerged aquatic plants.

Answer:

First question: Dioflagellate
Second question: Mangroves