A scientist was observing a specimen under a microscope. He obtained the specimen from pond water. He observed that the specimen was egg-shaped, had hairy structures all over its body, and was covered by a membrane. He also noticed two nuclei in the specimen’s body. To which phylum did the organism belong?

Ciliophora

Explanation:

Ciliophora phylum of kingdom Protista is characterized by the presence of short hair like projection called cilia all over the body surface of organisms. Cilia serve in locomotion of these organisms. These organisms are eukaryotes and have two nuclei. They are found in both freshwater and marine water habitats. One of the examples is Paramecium.