The option which is not a characteristic of chordates is chloroplasts in their cells.
Chordates do have a dorsal supporting rod (vertebrates are types of chordates - they have a spine), a dorsal hollow nerve cord (within the spine), and pharyngeal pouches. However, they do not have chloroplasts, because that is a characteristic of photoautothropic eukaryotes, which chordates certainly are not.
Species are single organisms that are able to reproduce, while a population is a group of species living in the same general area.
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Explanation:
why do you need the answer
Answer: Yes! there is life in the stratosphere but not the type you think, it's actually microbial life forms that live on it.
