Daphnia

Daphnia

• belong to the phylum Arthropoda
• live anywhere from acidic swamps to freshwater lakes
• commonly refered to as water fleas because of the way they swim 
• range in size from .2mm to 5mm
• have a translucent exoskeleton
• males are smaller then females 
• live longer in cold water 

Comparing worms- 3 phyla

Earth worm



Phylum: Annelida

Class: Clitellata

Characteristics: long, round, thick, segments, pink

Human Hook Worm

Phylum: Nematoda

Class: Acanthocephalo

Charactheristics: long, brown, thin, round

Round Worm



Phylum: Nematoda

Class: Echinoidea

Charactheristics: short, white, round, thin

Tape Worm

Phylum: Platyhelminthes

Class: Cestoda

Charactheristics: long, white, flat, segments

Amphioxus

Phylum: Chordata

Class: Branchiostoma

Characteristhics: thin, flat, pink, short

Phyla of animals

Mollusk

• edible
• live in water
• have a protective shell or layer
• have exoskeletons

Animals: Squid, Mussel, Edible Snail, Limpet, Amphineura

Chordata-frog

• undergoes complete metamorphesis
• have webbed feet
• require water for survival
• amphibians

Animal: Frog

Arthropoda-bee

• have wings
• undergo complete metamorphesis
• live in colony's
• are gatherers

Animal: Bee



Animals

animal characteristics:

• heterotrophic (require nitrogen and carbon for nourishment)
• ingest food (swallow or absorb food)
• primarly diploid (contain 2 full sets of chromosomes, one from each parent)
• sexuall reproduction (reproduce sexually)

types of development:

• gradual (animal is in the same state all through develpment)
• metamorphesis (animals goes though diffrent stages or states as it develops)

There are two groups in the animal kingdom; the vertebrates and the invertebrates, an example of a vertebrate would be a dog, while an example of an invertebrate would be a jellyfish this is because jellyfish do not have a backbone while a dog does. these two groups are then further divided into; Phyla porifera, Cnideria, Platyhelminthes, Nermatoda, Annelida, Mollusca, Arthropoda and Echinodermata.