1Animals are multicellular
made up of many cells
2Animals have eukaryotic cells
cells with a nucleus and other membrane bound organelles
3Animal cells do not have
cell walls.
4Animals are heterotrophs
they must consume other organisms to obtain energy and nutrients
5All animals move
at some point in their lives.
6motile
an organism that can move from place to place
7Advantages to being motile
finding food, running away from predators, finding shelter, finding a mate
8sessile
An organism that does not move. It remains attached to one place.
9Advantages to being sessile
low energy requirements, can live on small amounts of food
10Disadvantages to being motile
high energy and oxygen requirement
11Disadvantages to being sessile
can't move about to find food, shelter, mates or to avoid predators
12Sessile animals usually live
in water.
13Sessile animals usually have
motile larvae.
14sedentary
organisms that move very little
15Aristotle
a Greek philosopher who was the first to classify organisms according to their structural similarities
16Aristotle's classification system
had 2 main groups: plants and animals
17Carolus Linnaeus
developed a hierarchy for classifying organisms that is the basis for modern taxonomy
18taxon
a group of organisms in a classification system
19binomial nomenclature
two-word naming system that gives all organisms their scientific name
20A scientific name consists of
the genus and species name for that organism.
21the 8 levels of taxa used to classify organisms from largest and most general to smallest and most specific
domain, kingdom, phylum, class, order, family, genus, species
22scientific name for human
Homo sapiens - which has to be either underlined (handwritten) or in italics (typed)
23Common names for organisms can be confusing because
they are not unique.
24evolution
a process by which organisms change over a period of time
25phylogenetic trees
show the evolutionary relationships thought to exist among groups of organisms
26dichotomous keys
a tool scientists use to determine the identity of items in the natural world such as trees, flowers, mammals, reptiles, rocks, insects and fish
27Zoologists have named more than
1.5 million species of animals.
2894% of all animal species
are invertebrates
290.03% of all animal species
are mammals
30the 8 phyla of invertebrates we will study this 9 weeks
porifera, cnideria, platyhelminthes, nematoda, annelida, Mollusca, arthropoda, echinodermata
31species
a group of similar organisms that can breed and produce fertile offspring
32about 3%
of all animals are in the Phylum Chordata
33about 82%
of all species of animals are arthropods