Question

Phytoplankton, shown on the left in the image below, are microscopic organisms that can be found in freshwater and salt water environments. They perform photosynthesis to get energy and act as an important food source for larger organisms. mc020-1.jpg mc020-2.jpg Which characteristic is found in the whale but not in the phytoplankton? heterotrophic cell walls unicellularity prokaryote cells

Answer 1

Hey!
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The correct answer is "Heterotrophic"

Whales are large marine animals and mammals are heterotroph.

While phytoplanktons are autotrophs, it produces half the oxygen consumed by heterotrophs.

So that's the difference.
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Answer 2

Whale is a vertebrate and they are hetetrophic. Phytoplankton is an invertebrate and they are autotrophic. Whales are endothermic because they generate internal body heat to stay warm but these characteristic is not present in phytoplanton.