NQ - Lesson 3 - Marine Inverts Flashcards
What percentage of animals are invertebrate’s?
95%
Define Metazoa
Multicellular animals with differentiated tissues.
Define Protazoa
Single celled organisms, often microscopic
What categories can Metazoans be separated into? (2)
Protostomes and Deuterostomes.
What is the difference between a protostomes and deuterostomes blastopore?
Blastopore in protostomes developed into a mouth
Blastopore in deuterostomes developed into an anal opening.
Porifera Phylum?
Sponges
Give 3 characteristics of sponges (3)
Do not stop growing, specialized cells, can produce sexually and asexually.
What do Spongocytes create?
Spongin - fibrous meshwork of tough proteins
What is the sponge skeletal structure called?
Spicules- tiny spine-like structures made of silicone (SiO2).
What is the largest class of sponges called?
Demospongiae - Over 90% of sponges
Cnidaria Phylum? (3)
Hydras, corals and anemones, jellyfish
Defining feature of Cnidarians?
Nematocyst
What is a Nematocyst?
Coiled cell structure with barb on the end to inject toxins
Asexual reproduction in Cnidarians?
Cloning - Budding and fission (2)
Sexual reproduction in Cnidarians?
Hermaphroditic
Defining feature of Hydrozoans class of Cnidarians? (2)
Form colonies with polyp and medusa forms simultaneously, Hydroids.
Defining features of Scyphozoa class of Cnidarians? (2)
Mainly medusae stage, many large jellyfish
Defining feature of Anthozoa class of Cnidarians? (2)
Polyps only, mainly corals and anemones
Ctenophora Phylum?
Comb Jellies
How do Ctenophora differ from Jellyfish? (2)
Sting with sticky colloblasts in tentacles (non-venemous), used fused cillia for swimming
Ectoprocta Phylum?
Moss animals
Main features of Ectoprocta? (2)
Build colonial reefs with a hard exoskeleton, functionally similar to coral but structurally more like us.
Brachiopoda Phylum?
Lampshells
Main features of Brachiopoda? (2)
Resemble clams, can be attached by stalk or directly to sediment.
