Definitions
Hermaphroditic
A situation in which a single individual can produce male and female gametes
Know all the parts of the worm from a picture
Watch the dissection video
Serve as indicator water is not polluted
In saltwater, protect coral reefs from changes in temperature, nutrient levels and light
Phylum Porifera (sponges)
Roundworms
Phylum Nematoda
Has 5 fold radial symmetry, tube feet
Phylum Echinodermata
radial Symmetry
Symmetry that arises from a central axis
Open circulatory system
A system in which blood is not confined to blood vessels but is pumped into the body cavity to have direct contact with the organs
Two-stage life cycle:
•Medusa- Free-swimming cnidarian with a bell-shaped that produces gamete to be fertilized into a zygote. Zygote develops into planula which plants itself and develops into polyp
•Polyp- develops with a mouth and tentacles at one end. It reproduces asexually by budding and becomes a medusa.
Phylum Cnidarians
Parasasitic flatweorm, requires one or more intermediate hosts to infect primary host
Trematoda- flukes
Leeches
Phylum Annelida
Molting
The shedding and replacing of an old outer covering
External fertilization
Fertilization that occurs outside the parents' bodies
Tapeworms
Cestoda
Oysters, clams, snails, squid octopuses
Phylum Mollusca
Spiders
Class Arachnids
Compound eye
An eye that is made up of many small viewing units, each of which produces an image
Pollinator
An animal that carries pollen from one plant to another to aid in fertilization
Has eyespots and regenerates
Turbellaria -Planarians
Snails and slugs
Class gastropoda
Butterflies and moths
Class Lepidoptera
Metamorphosis
A developmental stage where an immature organism goes through extensive changes in body plan to enter an adult stage
Name the benefits of the mutualistic relationship of the clownfish and sea anemone
Clownfish protected from predators and has thick mucus on skin to prevent sea anemone attacking it
Clownfish provides nutrients to clean sea anemone
Clownfish also scares away predators of the sea anemone
Millipedes and centipedes
Class Myriapods
Cicadas
Hemiptera
Lancelets
Cephalochordates