Animals

Question 1

name 5 of these that make an organism an animal

Answer 1

• eukaryote
• heterotrophs
• multicellular
• no cell wall
  -capable of sexual reproduction
• form from a blastula
• motile, capable of motility

Question 2

what are the three classification of animal symmetry

Answer 2

1) no symmetry like a sponge
2) radial symmetry like a jelly fish
3) bilateral symmetry like humans

Question 3

True or false, radial symmetry is associated to active creatures and bilateral symmetry is associated with inactive creatures

Answer 3

False

Question 4

what is the term for nerves and sense being localized into a ‘head’

Answer 4

Cephalization

Question 5

What is the process of a zygote dividing over and over

Answer 5

Cleavage

Question 6

what is the end product of cleavage

Answer 6

a ball of cells called a blastula, and a tube to become the intestinal tract

Question 7

what is the term for an organism that form the mouth first

Answer 7

protostome

Question 8

what is the term for an organism that forms the anus first

Answer 8

Deuterostome

Question 9

what are germ layers

Answer 9

layers of tissues in the embryotic stage

Question 10

what are the germ layers in a diploblastic organism

Answer 10

Epiderm, a non-cellular layer and a endoderm

Question 11

What are the germ layers in a triploblastic organism

Answer 11

epiderm, mesoderm, endoderm

Question 12

what is a gastrovascular cavity

Answer 12

1) Sac like bag for digestion and circulation
2) means mouth and anus are the same hole
3) lack specialized compartments

Question 13

what does the term true gut mean

Answer 13

Organism has a digestive tract only for digestion, mouth to anus. has specialized compartments

Question 14

What is an advantage of a true gut over gastrovascular cavity

Answer 14

1) less likely to consume own waste
2) can continue eating

Question 15

what are the 9 major animal phyla

Answer 15

1) porifera
2) cnidaria
3) Nematoda
4) Arthropoda
5) platyhelminths
6) Annelida
7) Mollusca
8) Echinodermata
9) Chordata

Question 16

what classifies porifera and give an example

Answer 16

1) no true tissue, indeterminate growth, no symmetry
2) Sponges

Question 17

what classifies Cnidaria and give an example

Answer 17

1) true tissues, diploblastic, radial symmetry, lack cephalization, gastro cavities
2) Jellyfish, coral, anemone

Question 18

What two forms can Cnidaria exist as

Answer 18

polyp and medusa

Question 19

what is an example of Nematoda

Answer 19

round worm

Question 20

Does nematoda have true tissue and bilateral symmetry?

Answer 20

Yes

Question 21

does Nematoda show cephalization

Answer 21

very little, can see under microscope

Question 22

do nematoda have a true gut

Answer 22

yes

Question 23

are nematoda protostomes

Answer 23

yes they are

Question 24

what sort of animal are arthropodes and give examples

Answer 24

Animals with hard exoskeletons and segmented bodies like crabs, insects, spiders

Question 25

do arthropoda show cephalization

Answer 25

yes

Question 26

describe arthropoda digestive system and symmetry

Answer 26

they are triploblastic and are bilaterally symmetrical

Question 27

do arthropodes have gastrovascular cavity

Answer 27

no

Question 28

are arthropoda deuterostomes or protostomes

Answer 28

protostomes

Question 29

what does the term ecdysozoans mean

Answer 29

Animal can shed its exoskeleton

Question 30

what is an example of a Platyhelminthes

Answer 30

flatworm

Question 31

do platyhelminthes have a true gut

Answer 31

no, they have a gastrovascular cavity

Question 32

describe platyhelminthes germ layer and digestive system

Answer 32

1) triploblastic 2) gastrovascular cavity

Question 33

do platyhelminthes show cephalization

Answer 33

yes

Question 34

what are features of annelida

Answer 34

still protostomes, segmented bodies Earth worms

Question 35

what is the soft unsegmented part of a Mollusca often referred as

Answer 35

a foot

Question 36

what are examples of mollusca

Answer 36

snails, shellfish, octopus

Question 37

are mollusca radially symmetrical, deuterostomes and diploblastic

Answer 37

no, they are bilaterally symmetrical, protostomes and triploblastic

Question 38

what is a special feature of mollusca

Answer 38

they have a mantle and a mantle cavity, for waste and gas exchange between shell and body

Question 39

what three phyla are lophotrochozoans

Answer 39

platyhelminthes, annelida, mollusca

Question 40

what are examples of echinodermata

Answer 40

seastars, urchins

Question 41

how do echinodermata move

Answer 41

water vascular systems

Question 42

which phyla have regeneration ability

Answer 42

echinodermata

Question 43

how are sea stars echinodermata if they look radically symmetrical

Answer 43

because the larvae is bilaterally symmetrical which fits into ecnodermata category

Question 44

are Echinodermata protostomes

Answer 44

no, they are deuterostomes

Question 45

do echinodermata show cephalization

Answer 45

no

Question 46

what phyla do humans come under

Answer 46

chordata

Question 47

what other organisms are chordata

Answer 47

frogs, fish, birds, mammals

Question 48

are chordata deuterostomes or protostomes

Answer 48

deuterostomes

Question 49

what are key features displayed in some part of a organisms life to be classified as a chordata

Answer 49

have a notochord, pharyngeal slits, ventral heart, hollow dorsal nerve chord, post anal tail