Animal Development Quiz

What is gametogenesis?

Formation of gametes

What is cleavage?

Subdivision of zygote through mitosis

What is gastrulation?

Formation of germ layers

What is orangogenesis?

Initiation and differentiation of specific organisms

What is the difference between a fertilized and unfertilized egg?

You can see the nucleus and everything in an unfertilized egg, but you can’t see anything in a fertilized egg

In a blastula, where are the blastomeres located?

The edge of the blastula

What is the blastocoel in the blastula?

The empty space in the middle.

What group are all of the animals in?

metazoa

What phylum are the sponges in?

phylum porifera

What is the first major division of animals?

Eumetazoa, have true tissues

What phylum is in the eumetazoa?

Phylum cnidaria

What are the classes in the phylum cnidaria?

Hydrazoa, scyphozoa, cubozoa, anthozoa

What are in the hydrazoa?

hydras

What are in the cubozoas?

cube shaped jellyfish

What are in the scyphozoa?

true jellyfish

What are in the anthozoa?

corals and sea anemone

What is the second major division of animals?

Bilateria, have bilateral symmetry

What is the bilateria divided into?

Deuterostomia and protostomia

What is the protostomia divided into?

Ecdysozoa and spiralia

What phylum is in the spirialia?

Phylum platyhelminthes, phylum mollusca, and phylum annelida

What are the classes in phylum platyhelminthes?

turbellaria, trematoda, cestoda

What are turbellaria?

flatworms (look like hammerhead worms)

What are trematoda?

Flukes (look like an oval with a pointy edge

What are cestoda?

tape worms (look like super long pieces of string)

What are the classes of phylum mollusca?

gastropoda, bivalvia, and cephalopoda

What are in the gastropoda?

things that live in one shell such as snails and whelks

What are in the bivalvia?

Have two shells, such as oysters and clams

What are in the cephalopoda?

Squid, cuttlefish, and octopi

What are the classes in phylum annelida?

oliogochaeta, polychaeta, hirudinida

What are in the oliogochaeta?

earthworms

What are in the polychaeta?

worms with bristles or legs

What are in the hirudinida?

leeches

What phylum is in ecdysozoa?

Phylum arthropoda

What subphylums are in ecdysozoa?

Chelicerata, crustacea, and hexapoda

What are in chelicerata?

Spiders, mites, horseshoe crabs

What are in crustacea?

Have a hard exoskeleton such as rollie pollies and scorpions

What are in hexapoda?

insects

What phylums are in the deuterostomia?

Phylum echinodermata and phylum cordata

What subphylums are in phylum cordata?

Cephalochordata, urochordata, and vertebrata

What are in cephalochordata?

lancelets (look like tadpole things with ribs)

What are in urochordata?

Tunicate (kind of look like bongs)

What are in vertebrata?

Vertebrates

What are the classes of phylum echinodermata?

asteroidea, echinoidea, and holothuroidea

What are in asteroidea?

Sea stars

What are in echinoidea?

Sea urchins and sea dollars

What are in holothuroidea?

Sea cucumbers