Study the list of organisms below and use them to answer the questions. I-Hydra II-Owl...

BIOLOGY
WAEC 2023

Study the list of organisms below and use them to answer the questions.

I-Hydra

II-Owl

III-Snake

IV-Snail

The arrangement of the organisms in order of increasing complexity is

  • A. II-III-I-IV
  • B. I-IV-III - II
  • C. I-II-III-IV
  • D. IV-III-II - I.

Correct Answer: B. I-IV-III - II

Explanation

The arrangement of organisms in order of increasing complexity is Hydra (a simple multicellular organism), Snail (a more complex invertebrate), Snake (a simple vertebrate), and Owl (a more complex vertebrate). This is because as we move from invertebrates to vertebrates, the level of organization and complexity increases. The complexity of an organism can be determined by its level of organization, from cellular to tissue to organ to system level.



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