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*’animals’ are [‘multi-cellular’ / ‘eukaryotic’ organisms] of the kingdom animalia*
(also called “meta-zoa”)
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(the “animal kingdom” emerged as a ‘clade’ within “Apoikozoa” as the ‘sister group’ to the ‘choanoflagellates’)
(‘animals’ are ‘motile’, meaning they can move spontaneously and independently at some point in their lives)
(their ‘body plan’ eventually becomes fixed as they develop, although some undergo a process of ‘metamorphosis’ later in their lives)
(all animals are ‘heterotrophs’: they must ingest other ‘organisms’ or their products for ‘sustenance’)
(most known ‘animal phyla’ appeared in the ‘fossil record’ as ‘marine species’ during the ‘Cambrian explosion’, about 542 million years ago)
(‘animals’ can be divided broadly into ‘vertebrates’ and ‘invertebrates’)
(‘vertebrates’ have a ‘backbone’ or ‘spine’ (‘vertebral column’), and amount to less than 5% of all described ‘animal species’)
(they include ‘fish’, ‘amphibians’, ‘reptiles’, ‘birds’, and ‘mammals’)
(the remaining animals are the ‘invertebrates’, which lack a ‘backbone’)
(these include
‘molluscs’ (‘clams’, ‘oysters’, ‘octopuses’, ‘squid’, ‘snails’);
‘arthropods’ (‘millipedes’, ‘centipedes’, ‘insects’, ‘spiders’, ‘scorpions’, ‘crabs’, ‘lobsters’, ‘shrimp’);
‘annelids’ (‘earthworms’, ‘leeches’),
‘nematodes’ (‘filarial worms’, ‘hookworms’)
‘flatworms’ (‘tapeworms’, ‘liver flukes’),
‘cnidarians’ (‘jellyfish’, ‘sea anemones’, ‘corals’),
‘ctenophores’ (‘comb jellies’),
and ‘sponges’
(the study of ‘animals’ is called ‘zoology’)
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥