Which of the following statements about plankton or nekton is NOT correct? a. Nekton are active swimmers.
b. Phytoplankton are important primary producers.
c. All plankton are closely related to plants.
d. Plankton drift or swim weakly.
e. Zooplankton are heterotrophic plankton.

B is the answer

Explanation:

plants make their own food and in this case phytoplankton aslo plankton are known as plants

/the trachea, commonly known as the windpipe

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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