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Describe the main evolutionary sequence in animals

Multicellularity → Tissues → 3 germ layers → Body cavity (pseudocoelom → coelom) → Digestive tract → Circulatory system → Segmentation → Skeleton → Radial → Bilateral symmetry → Notochord → Amniotic egg

Which phylum lacks true tissues?

Porifera

Which phylum has true tissues and two germ layers?

Cnidaria

Which phylum has three germ layers but an incomplete digestive tract?

Platyhelminthes

Which phylum has a true coelom and complete digestive tract?

Mollusca

Which phylum has a closed circulatory system and complete digestive tract?

Annelida

Which phylum has a pseudocoelom and is an ecdysozoan?

Nematoda

Which phylum has a chitin exoskeleton and open circulatory system?

Arthropoda

Which phylum is deuterostome with radial symmetry in adults?

Echinodermata

Which phylum has a notochord and dorsal nerve cord?

Chordata

What is the circulatory system type in annelids?

Closed

What is the circulatory system type in arthropods?

Open

What is the circulatory system type in chordates?

Closed

What type of digestive system do flatworms have?

Incomplete (gastrovascular cavity)

What type of digestive system do mollusks, annelids, arthropods, and chordates have?

Complete

What development type do annelids and mollusks have?

Protostome

What development type do echinoderms and chordates have?

Deuterostome

Which phyla are ecdysozoans?

Nematoda and Arthropoda

Which phylum includes sponges?

Porifera

Which phylum includes jellyfish and hydra?

Cnidaria

Which phylum includes tapeworms and flukes?

Platyhelminthes

Which phylum includes clams, snails, and octopus?

Mollusca

Which phylum includes earthworms and leeches?

Annelida

Which phylum includes roundworms and hookworms?

Nematoda

Which phylum includes insects, crustaceans, and arachnids?

Arthropoda

Which phylum includes sea stars and sea urchins?

Echinodermata

Which phylum includes fish, amphibians, reptiles, birds, and mammals?

Chordata

Which phyla have parasitic members?

Platyhelminthes, Nematoda, Annelida, Arthropoda

How do parasitic animals infect hosts?

By ingestion of eggs/larvae or skin penetration

Name some parasitic animals

Tapeworms, flukes, hookworm, pinworm, leech, tick

Name major venomous snakes

Coral snake, rattlesnake, water moccasin, copperhead

Name venomous spiders

Brown recluse, black widow

Name venomous mollusks

Cone snails, blue

Name venomous cnidarians

Jellyfish

Which invertebrate phylum has the most species?

Arthropoda

Which vertebrate class has the most species?

Osteichthyes (bony fish)

Which animals cause clogging by attaching to hard surfaces?

Barnacles

Barnacle classification

Arthropoda (crustacean)

Ascaris classification

Nematoda

Clam classification

Mollusca

Octopus classification

Mollusca

Snail classification

Mollusca

Squid classification

Mollusca

Conch classification

Mollusca

Nudibranch classification

Mollusca

Oyster classification

Mollusca

Mussel classification

Mollusca

Scorpion classification

Arthropoda

Tick classification

Arthropoda

Lobster classification

Arthropoda

Scallop classification

Mollusca

Define protostome

Animal whose mouth develops before anus

Define deuterostome

Animal whose anus develops before mouth

Define ecdysis

Shedding or molting of exoskeleton

Define nephridia

Excretory organs found in annelids and mollusks

List four chordate traits

Notochord, dorsal nerve cord, pharyngeal slits, post