1. Why Euglena is called plant-animal? Why whales are not grouped under fishes?
Kindly refer to the following links for similar queries,
https://www.meritnation.com/ask-answer/question/why-is-euglena-called-plant-animal/diversity-in-living-organisms/589938
https://www.meritnation.com/ask-answer/question/state-two-reasons-why-whales-are-not-grouped-with-fishes/diversity-in-living-organisms/6739166
Hope this information clears your doubts about the topic.
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https://www.meritnation.com/ask-answer/question/why-is-euglena-called-plant-animal/diversity-in-living-organisms/589938
https://www.meritnation.com/ask-answer/question/state-two-reasons-why-whales-are-not-grouped-with-fishes/diversity-in-living-organisms/6739166
Hope this information clears your doubts about the topic.
Keep asking!!
Regards