Your Research Group Has Isolated a Single Photosynthetic Species from a Marine

question 217

Multiple Choice

Your research group has isolated a single photosynthetic species from a marine sample.Interestingly enough, the morphology of the species seems to undergo changes based on the environmental conditions you subject it to.Upon closer inspection, you notice two flagella, one of which is nestled in an equatorial groove.Based on these observations, the organism is most likely

• A) a bacterial endosymbiont that has been taken up by a new host.
• B) a free-living dinoflagellate that can change lifestyles.
• C) a member of the stramenopile clade.
• D) undergoing directed evolution in the laboratory setting.
• E) undergoing a type of programmed cell death.

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Definitions:

Ethmoidal Sinus

Air-filled spaces located within the ethmoid bone between the nose and eyes, part of the paranasal sinuses.

Maxillary Sinus

The maxillary sinus is one of the four pairs of paranasal sinuses that are located within the bones of the face and cheeks, specifically within the maxilla or upper jaw bone.

Lordosis

A curvature of the spine that results in an exaggerated inward curve of the lower back.

Kyphosis

A spinal disorder where there is an excessive outward curve of the spine, leading to a hunchback appearance.