A Biologist Is Asked to Examine and Describe a Newly

A biologist is asked to examine and describe a newly discovered species from a sample of fresh-water plankton. The organism is a heterotrophic unicell with a single flagellum surrounded by a collar of microvilli. The biologist correctly predicts that this organism has

A) an elaborate, proteinaceous skeleton composed of overlapping, helical strips.
B) a basket-like skeleton made of silica strips, cemented together and surrounded by a membranous web.
C) an intricate spherical skeleton composed of siliceous spines radiating out from a central capsule.
D) a cytoskeletal extension composed of actin.
E) no skeleton.

Correct Answer:

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