Biology

Question 1

Porifera

Answer 1

Sponges

Question 2

Cnidaria

Answer 2

Jellyfish and Sea Anemones

Question 3

Platyhelminthes

Answer 3

Flatworms

Question 4

Nematoda

Answer 4

Roundworms

Question 5

Annelida

Answer 5

Segmented Worms

Question 6

Arthropoda

Answer 6

Insects, lobsters, spiders

Question 7

Mollusca

Answer 7

Clams, snails, and squids

Question 8

Echinodermata

Answer 8

Sea stars and sea urchins

Question 9

Chordata

Answer 9

Fish, birds, reptiles, mammals

Question 10

Cleavage

Answer 10

When a single cell is converted to a multicellular zygote

Question 11

Blastula

Answer 11

A hollow ball of cells

Question 12

Gastrulation

Answer 12

Occurs when cells move inside the blastula and form multiple layers of cells called germ layers

Question 13

Endoderm

Answer 13

Inside layer

Question 14

Ectoderm

Answer 14

Outside layer

Question 15

Mesoderm

Answer 15

Middle layer

Question 16

Animals with 1 germ layer

Answer 16

Asymmetrical

Question 17

Animals with 2 germ layers

Answer 17

Radial symmetry

Question 18

Animals with 3 germ layers

Answer 18

Bilateral symmetry

Question 19

Mesenchyme

Answer 19

A jelly-like substance in sponges

Question 20

Collar cells

Answer 20

Line the inside of the sponge’s hollow sac-like body. They appear to have a collar with flagella.

Question 21

Amebocytes

Answer 21

Specialized cells in sponges. Digest food. Bring oxygen to sponge. Produce lime or silica to make spicules.

Question 22

Three classes of flatworms

Answer 22

Flukes (parasitic). Tapeworms (parasitic). Planarians (free-living)

Question 23

Ganglion

Answer 23

Mass of nerve cells that functions like a simple brain in the anterior

Question 24

Eyespots

Answer 24

Planarians have 2 of these which help them to sense light

Question 25

Scolex

Answer 25

A small knoblike head with hooks and suckers that allows tapeworms to attach to the intestinal wall of their host

Question 26

Peristalasis

Answer 26

Muscles surrounding the roundworm's digestive system squeeze the food and push it thru until the waste is excreted out the anus

Question 27

Clitellum

Answer 27

A barrel-shaped swelling around an earthworm's body that assists in reproduction

Question 28

Nephridia

Answer 28

Coiled tubes in earthworms that are open at both ends and function as tiny kidneys

Question 29

Cnidarians' Symmetry

Answer 29

Radial

Question 30

Mesoglea

Answer 30

The jelly-like middle layer in a cnidarian

Question 31

Cnidocytes

Answer 31

Stinging cells on tentacles of a cnidarian

Question 32

Nematocysts

Answer 32

Coiled tubes containing an attached barb that discharges a toxin when launched

Question 33

Class Scyphozoa

Answer 33

Jellyfish

Question 34

Class Anthozoa

Answer 34

Sea Anemone and Coral

Question 35

Class Hydrozoa

Answer 35

Hydra, Hydroid Colonies, and Portuguese Man-of-War

Question 36

Echinoderms' Symmetry

Answer 36

Bilateral symmetry during larval stage. Pentaradial symmetry when mature

Question 37

Sieve Plate

Answer 37

Filters sea water before it enters the system

Question 38

Ring Canal

Answer 38

Where water enters, surrounding the mouth

Question 39

Radial Canals

Answer 39

Extend from central part of the echinoderm's body down each ray

Question 40

Lateral Canals

Answer 40

Branch perpendicularly off the radial canals and terminate at tube feet

Question 41

Tube Feet

Answer 41

Used for breathing and movement

Question 42

Ampulla

Answer 42

Muscle structures on the internal side of tube feet

Question 43

Class Asteroidea

Answer 43

Sea Stars. Have two stomachs

Question 44

Class Ophiuroidea

Answer 44

Brittle Stars

Question 45

Class Echinoidea

Answer 45

Sea urchins and sand dollars

Question 46

Class Holothuroidea

Answer 46

Sea Cucumbers. Leathery skin. Adults exhibit radial symmetry.

Question 47

Mollusks' Symmetry

Answer 47

Bilateral

Question 48

Visceral Mass

Answer 48

The mass in a mollusk that contains the vital organs

Question 49

Mantle

Answer 49

Skin-like organ covering the visceral mass

Question 50

Class Bivalvia

Answer 50

Clams, oysters, mussels, scallops, and geoducks

Question 51

Umbo

Answer 51

The small bulge on the two shells near the hinge (on a mollusk)

Question 52

Suspension Feeders

Answer 52

Filtering water and feeding on food suspended in water

Question 53

Class Gastropoda

Answer 53

Slugs, conchs, abalones, nudibranchs, whelks, dowries, murexes, and snails

Question 54

Radula

Answer 54

Rough, tongue-like organ used to scrape food into their mouth and carry it to the digestive tract

Question 55

Class Cephalopoda

Answer 55

Nautilus, cuttlefish, squid, and octopus

Question 56

Arthropods' Symmetry

Answer 56

Bilateral

Question 57

Class Insecta

Answer 57

Insects

Question 58

Labrum and Labrium

Answer 58

Form the upper and lower lips (insects)

Question 59

Mandibles

Answer 59

Used to crush and tear food apart

Question 60

Maxillae

Answer 60

Used to chew food

Question 61

Three segments on the thorax

Answer 61

Prothorax, mesothorax, metathorax. Six legs. A pair of legs on each segment (insects). Four wings: a pair on the mesothorax and a pair on the metathorax

Question 62

Spiracles

Answer 62

Small pores on each segment allowing air to enter the body (insects)

Question 63

Aedeagus

Answer 63

Organ that allows male to secrete sperm

Question 64

Subphylum Chelicerates

Answer 64

Spiders, horseshoe crabs, ticks, scorpions

Question 65

Class Merostomata

Answer 65

Horseshoe crabs

Question 66

Class Arachnid

Answer 66

Spiders, ticks, mites, and scorpions

Question 67

Subphylum Myriapoda

Answer 67

Centipedes and millipedes

Question 68

Class Chilopoda

Answer 68

Centipedes

Question 69

Class Diplopoda

Answer 69

Millipedes

Question 70

Subphylum Crustaceans

Answer 70

Barnacles, Crabs, Lobsters, Crayfish, Shrimp, Woodlice, and Beachfleas

Question 71

Notochord

Answer 71

Rod-shaped structure that provides skeletal support

Question 72

Subphylum Urochordata

Answer 72

Tunicates (sea squirts)

Question 73

Subphylum Cephalochordata

Answer 73

Lancelets

Question 74

Class Agnatha

Answer 74

Jawless fish: hagfish and lampreys

Question 75

Class Chondrichthyes

Answer 75

Cartilaginous fish (sharks, rays, skates)

Question 76

Class Osteichthyes

Answer 76

Bony Fish

Question 77

Order Urodela

Answer 77

Salamanders and Newts

Question 78

Order Anura

Answer 78

Frogs and toads

Question 79

Order Apoda

Answer 79

Caecilians

Question 80

Order Sphenodontia

Answer 80

Tuatara

Question 81

Order Squamata

Answer 81

Snakes and lizards

Question 82

Order Testudines

Answer 82

Turtles