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BIO101 > Animals > Flashcards

Animals Flashcards

1
Q

name 5 of these that make an organism an animal

A
  • eukaryote
  • heterotrophs
  • multicellular
  • no cell wall
    -capable of sexual reproduction
  • form from a blastula
  • motile, capable of motility
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2
Q

what are the three classification of animal symmetry

A

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

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3
Q

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

A

False

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4
Q

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

A

Cephalization

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5
Q

What is the process of a zygote dividing over and over

A

Cleavage

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6
Q

what is the end product of cleavage

A

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

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7
Q

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

A

protostome

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8
Q

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

A

Deuterostome

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9
Q

what are germ layers

A

layers of tissues in the embryotic stage

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10
Q

what are the germ layers in a diploblastic organism

A

Epiderm, a non-cellular layer and a endoderm

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11
Q

What are the germ layers in a triploblastic organism

A

epiderm, mesoderm, endoderm

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12
Q

what is a gastrovascular cavity

A

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

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13
Q

what does the term true gut mean

A

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

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14
Q

What is an advantage of a true gut over gastrovascular cavity

A

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

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15
Q

what are the 9 major animal phyla

A

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

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16
Q

what classifies porifera and give an example

A

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

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17
Q

what classifies Cnidaria and give an example

A

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

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18
Q

What two forms can Cnidaria exist as

A

polyp and medusa

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19
Q

what is an example of Nematoda

A

round worm

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20
Q

Does nematoda have true tissue and bilateral symmetry?

A

Yes

21
Q

does Nematoda show cephalization

A

very little, can see under microscope

22
Q

do nematoda have a true gut

A

yes

23
Q

are nematoda protostomes

A

yes they are

24
Q

what sort of animal are arthropodes and give examples

A

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

25
Q

do arthropoda show cephalization

A

yes

26
Q

describe arthropoda digestive system and symmetry

A

they are triploblastic and are bilaterally symmetrical

27
Q

do arthropodes have gastrovascular cavity

A

no

28
Q

are arthropoda deuterostomes or protostomes

A

protostomes

29
Q

what does the term ecdysozoans mean

A

Animal can shed its exoskeleton

30
Q

what is an example of a Platyhelminthes

A

flatworm

31
Q

do platyhelminthes have a true gut

A

no, they have a gastrovascular cavity

32
Q

describe platyhelminthes germ layer and digestive system

A

1) triploblastic
2) gastrovascular cavity

33
Q

do platyhelminthes show cephalization

A

yes

34
Q

what are features of annelida

A

still protostomes, segmented bodies

Earth worms

35
Q

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

A

a foot

36
Q

what are examples of mollusca

A

snails, shellfish, octopus

37
Q

are mollusca radially symmetrical, deuterostomes and diploblastic

A

no, they are bilaterally symmetrical, protostomes and triploblastic

38
Q

what is a special feature of mollusca

A

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

39
Q

what three phyla are lophotrochozoans

A

platyhelminthes, annelida, mollusca

40
Q

what are examples of echinodermata

A

seastars, urchins

41
Q

how do echinodermata move

A

water vascular systems

42
Q

which phyla have regeneration ability

A

echinodermata

43
Q

how are sea stars echinodermata if they look radically symmetrical

A

because the larvae is bilaterally symmetrical which fits into ecnodermata category

44
Q

are Echinodermata protostomes

A

no, they are deuterostomes

45
Q

do echinodermata show cephalization

A

no

46
Q

what phyla do humans come under

A

chordata

47
Q

what other organisms are chordata

A

frogs, fish, birds, mammals

48
Q

are chordata deuterostomes or protostomes

A

deuterostomes

49
Q

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

A

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

BIO101 (10 decks)

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