useless trivia: What Word Means: A Brook?

Questions

Any member of a group of protozoa (single-celled animals) that are blood parasites?

Any month that starts on a Sunday will have a ______________ in it?

Any of a group of composite organisms made up of a fungus & an alga living in symbiotic association (symbiosis)?

Any of a large group of chemicals almost exclusively organic in nature, used for the coloring of textiles, inks, food products, & other substances?

Any of as many as 50,000 marine, freshwater, & terrestrial species of mollusk?