Biology, 24.04.2020 03:49, doggielover36

In looking at a sample of pond water through low power in the microscope, you notice a tiny (0.5 mm) animal busily sweeping small algae cells towards its mouth using whorls of cilia. You can see its complete mouth-tube-anus digestive tract. This animal is :

1.a brachiopod.
2.a ctenophore.
3.a flatworm.
4.a rotifer.

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In looking at a sample of pond water through low power in the microscope, you notice a tiny (0.5 mm)...