Some Types of Dinoflagellates (Single-Celled Eukaryotes) Are Photosynthetic

question 96

Multiple Choice

Some types of dinoflagellates (single-celled eukaryotes) are photosynthetic. They have flagella and can swim through the water. If you grow them in a container that is lit from the right side, the cells will swim to the right side of the container. If the researcher turns off the light, the dinoflagellates will swim randomly about the container. Now the researcher shines the light on the left side of the container, and the dinoflagellates all swim directly to the left side of the container. This is an example of:

• A)kinesis
• B)taxis
• C)classical conditioning (container and the light would be the paired stimuli)
• D)circadian clock

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