Question

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

Answer 1

B. ciliophora

Answer 2

There are three ways you can solve this problem:

1.- You can guide yourself through knowledge, and therefore know the answer. There isn´t much to explain here.

2.- You can eliminate obvious options such as sarcodina or apicomplexa. Euglenoid isn´t an extremely obvious removal since it has a flagela, which can be mistook by a hairy-structure. But, if you do things correctly, obtaining your answer wont be a problem.

3.- You can do an etymologic-guess, which works really well in biology. If you guide yourself this way, you´ll bump into the answer quickly --> "cilio" means hair and according to the description the specimen was covered in hairy structures.

Hope it helped,

BiologiaMagister