Select the correct answer.
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?
A.
sarcodina
B.
ciliophora
C.
apicomplexa
D.
euglenoid

Question

Select the correct answer.
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?
A. 
sarcodina
B. 
ciliophora
C. 
apicomplexa
D. 
euglenoid

XxXNessalulbaddieXxX · Answer

well what do u know about this topic, and then maybe u can rule out some choices

AZ · Answer

Search up each organism and compare it to what your question is asking. Answer choice A: sarcodina "The Phylum Sarcodina is comprised of protozoan, or sarcodines, that share several characteristics; sarcodines have long, trailing cytoplasm and use unique cytoplasmic feet, or extensions, called pseudopodia to facilitate movement." https://www.reference.com/science/characteristics-phylum-sarcodina-b59dabc85f2edc46 Answer choice B: ciliophora which also goes by ciliate "All ciliates share two features: a coating of cilia on their cell surfaces and two types of nuclei within single cells. The two nuclei types in each ciliate cytoplasm are different sizes; they are called the micronucleus and the macronucleus" Tamara L. Horton, Laura F. Landweber, in Encyclopedia of Biodiversity, 2001 https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ciliate Answer choice C: apicomplexa "A defining characteristic of the apicomplexa is a group of organelles found at one end--called the apical end--of the organism. This 'apical complex' includes secretory organelles known as micronemes and rhoptries, polar rings composed of microtubules, and in some species a conoid which lies within the polar rings" https://www.tulane.edu/~wiser/protozoology/notes/api.html Answer choice D: euglenoid https://en.wikipedia.org/wiki/Euglenid#Structure Read that one paragraph under the section "Structure"

AZ · Answer

Which one of those answer choices mentions it has a hairy structures all over its body and is covered by a membrane. 
But the key differentiator is that it has two nuclei. Which one has two nuclei?

What's your final answer then?