definition
Plankton consisting of small animals and the immature stages of larger animals
sentence
Oil and gas was formed around 100 million years ago when tiny marine plants and animals called phytoplankton and zooplankton floated on the sea's surface.
They typically eat insects and floating vegetable matter but their diet also includes zooplankton, aquatic insect larvae, and worms.
They typically eat insects and floating vegetable matter but their diet also includes zooplankton, aquatic insect larvae, and worms.
difficulty
hard
toefl frequency
1
toefl classification