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

question 28

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. This result suggests that dinoflagellates:

• A)sense light.
• B)sense Earth's magnetic field.
• C)sense a heterotrophic food source.
• D)swim in random directions.
• E)swim in response to temperature gradients.

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