lecture 6 arthropoda 1: gen characteristics, crustatceans, millipedes, centipedes, spiders

Question 1

what does the phylum arthropoda mean in latin

Answer 1

arthro = joint
poda = feet

Question 2

what kind of symmetry do arthropods have

Answer 2

bilateral

Question 3

what kind of coelomates are arthropods

Answer 3

coelomates

Question 4

what kind of skeleton do arthropods have

Answer 4

exoskeleton

Question 5

what are arthropods skeletons made of

Answer 5

chitin and proteins

segregated by the epidermis

Question 6

benefits of the exoskeleton

Answer 6

protects you and prevents water loss
independence from environment
more efficient locomotion

Question 7

drawbacks of an exoskeleton

Answer 7

its makes it difficult to grow and gas exchange difficult.

limited movement

Question 8

four stages of moulting

Answer 8

intermoult
premoult
moult
post moult

Question 9

how does moulting happen

Answer 9

first the skeleton seperates from the cells, then a new cuticle forms
new skin has room for expansion

Question 10

what type of body do arthropods have

Answer 10

segmented

Question 11

what kind of legs do arthropods have

Answer 11

paired, jointed appendages

Question 12

what are the parts of the body

Answer 12

head
thorax
abdoment

Question 13

what does the thorax carry

Answer 13

the legs

Question 14

whats in the abdomen

Answer 14

most of the internal organs

Question 15

how do small arthropods have gas exchange

Answer 15

through the skin, restricted to damp areas

Question 16

how do aquatic crustations have gas exchange

Answer 16

gills Blood to supply to filaments O2 diffise from water to blood

Question 17

how do terrestrial scorpions & spiders have gas exchance

Answer 17

book lungs In terrestrial need to take O2 from air – 2 solutions – book lung – big spiders and scorpions is inside the body air flows in through a pair of holes on the abdomen and diffuses across membranes in these plaques.

Question 18

how do terrestrial insects and millipedes have gas exchange

Answer 18

tracheae
Many insects, small spiders (can have both) and millipedes – system of tubes getting narrower and narrower as get deeper in the body – tubes also contain fluid O2 diffuses, but no blood – tiny tubes go right into the muscles and organs.

Question 19

what do mechanoreceptors sense

Answer 19

touch and vibrations

Question 20

what do chemo receptors sense

Answer 20

smell and taste

Question 21

what do photoreceptors sense

ocelli & compound eyes

Answer 21

light

Question 22

what kind of eyes do spiders have

Answer 22

simple eyes with a single lense but up to 8

Question 23

what type of sexual reproduction do arthropods have

Answer 23

sexual reproduction with seperate sexes
external (horseshoe crab)
internal

Question 24

how do horseshoe crabs mate

Answer 24

female lays in hole on beach and male releases sperm over the eggs.

Question 25

what are the arthropod subphylums

Answer 25

``` trilobitomorpha pycnogonida crustacea myriapoda chelicerata hexapoda ```

Question 26

fun fact about trilobitomorpha

Answer 26

all speices are currently extinct

Question 27

fun fact about pycnogonida

Answer 27

sea spiders | all marine species, sometimes joined with the spiders

Question 28

what families are included in the subphylum crustacea

Answer 28

shrimp, crabs, copepods, waterfleas | all aquatic except woodlice

Question 29

what cuticles do crustacea have

Answer 29

epicuticle and protocuticle with calcium carbonate

Question 30

how do crustacea have gas exchange

Answer 30

gills

Question 31

crustacea gill speciality

Answer 31

Gills can have very developed sensory organs, many associated with floor – walking or burrowing.

Question 32

what kind of vision do crustacea have

Answer 32

compound and simple eye

Question 33

how do crustacea reproduce

Answer 33

seperate sexes, internal fertelisation

Question 34

what kind of larva do crustaceas have

Answer 34

nauplious larva

Question 35

what order are woodlice

Answer 35

isoptera

Question 36

what do crustaceans typically have 5 of

Answer 36

pairs of marching legs

Question 37

what do crustateans typically have fused

Answer 37

head and thorax

Question 38

what are some of the crustaceans transformations of

Answer 38

the mouthparts

Question 39

how is sperm transfered in crustaceans

Answer 39

using first abdominal segment appendages (gonopods) inserted into female genital opening into seminal recepticle

Question 40

what does subphylum myriapoda mean in latin

Answer 40

myria 10,000 | poda = feet

Question 41

what organisms are myriapods

Answer 41

milipedes & centipedes

Question 42

what kind od cuticle do they have

Answer 42

epicuticle waxy waterproof

Question 43

how do myriapods have gas exchange

Answer 43

tracheae

Question 44

what kind of eyes do myriapods have

Answer 44

simple eyes | dark environment

Question 45

how do myriapods reproduce

Answer 45

seperate sexes indirect sperm transfere with spermatophore

Question 46

what are the myriapoda body parts

Answer 46

head with one anntena and mandibles body with many segments jointed appendages

Question 47

millipede: no. legs per segment

Answer 47

2 pairs

Question 48

centipede: no. legs per segment

Answer 48

1 pair

Question 49

what class are milipedes

Answer 49

diplopoda

Question 50

what class are centipedes

Answer 50

chilopoda

Question 51

what does the subphylum chelicerata mean in latin

Answer 51

chelice = claws

Question 52

who are some chelicerats

Answer 52

scorpians, spiders, harvestmen, ticks | all terrestrial except horseshoe crabs

Question 53

how do chelicerates exchange gas

Answer 53

gills, book lungs, tracheae

Question 54

what kind of eyes do chelicerates have

Answer 54

simple and compound

Question 55

how do chelicerates reproduce

Answer 55

seperare sexes indirect sperm transfere with spermatophore

Question 56

what are the chelicerata body parts

Answer 56

cephalothorax 4 pairs of marching legs no antenna chelicera and pedipalps(one pair of each)

Question 57

how do scorpians shag

Answer 57

complex courtship females have a tendancy to eat the males lasts 45 mins

Question 58

how do harvestmen shag

Answer 58

for 38 mins

Question 59

how do spiders fuck

Answer 59

– sucks up sperm/silk into his pedipalp and inserts this into the females genital opening

Question 60

what is the species name for harvestmen

Answer 60

opiliones

Question 61

how do chelicerata do parental care

Answer 61

wolf spider and scorpions carry young on thier backs to protect them and provide food

Question 62

what class and orders are in chelicerata

Answer 62

class: arachnida order: araneae opiliones acarina

Question 63

main characterisitic of arthropods

Answer 63

``` exoskelton segmented body well defines head jointed appendages respratory organs sensory organs ```

Question 64

how mang pairs of legs to isopods have

Answer 64

7