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Unit 18: Biology Part 1 Page 15 of 60

Class: Organisms that share one survive on their own and resemble
or more attributes. one organism)

Order: Containing one or more Family: Physaliidae (Organisms of
families. the genus Physalia)

Family: Organisms descended Genus: Physalia (Colonies of
from the same ancestors sharing specialized cells which float on the
relatively similar characteristics. Indian or Pacific Oceans via gas-

Genus: Groups of species that are filled bladders)
structurally similar or Species: P.
phylogenetically related. physalis

Species: Organisms capable of (Portuguese Man-
mating with one another. O-War)
An easy way to remember the

order of the hierarchy is to think of
this pneumonic: Kings Play Cards
On Funny Green Stools—each first Lesson 1:
letter stands for the first letter of a Invertebrates
level in the hierarchy (Kingdom,
phylum, etc). What are invertebrates?

For example the Invertebrates are animals without
classification of the backbones. This is contrasted with
jellyfish the animals with backbones, or
Portuguese Man-O- vertebrates.
War (shown): Examples of invertebrates are

Kingdom: Animalia jellyfish, star fish, insects, and
(Multicellular, earthworms. An example of a
heterotrophic, eukaryotic) vertebrate is… Us (humans)!

Phylum: Cnidaria (Radial Sponges and Cnidarians
symmetry, stinging cells)
Invertebrates
Class: Hydrozoa (very small are organisms
predatory animals, mostly without
saltwater, solitary and colonial)
backbones.
Order: Siphonophora (Colonies of Let’s look at
specialized cells which could not two very

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