Week 2

Question 1

What does benthic mean?

Answer 1

“on the bottom”

Question 2

what are benthic macroinvertebrates

Answer 2

wide variety of organisms that live on the bottom of lakes, ponds and rivers

Question 3

what are some characteristics of class gastropoda

Answer 3

snails and limpets, highly mobile, contain radula

Question 4

what are some characteristics of class bivalva

Answer 4

clams and mussels, no radula, filter feeders

Question 5

T or F: gastropods and bivalves live in saltwater

Answer 5

F; freshwater

Question 6

what distinguishes the chonchifera clade

Answer 6

posess a shell

Question 7

one of the earliest animals to invade the land are predicted to be _____

Answer 7

snails

Question 8

what indicates mollluscs originated in the sea?

Answer 8

fossil evidence

Question 9

what is contained in the head-foot region of mollusc

Answer 9

feeding and locomotor organs

Question 10

what is contained in the visceral mass of the mollusc

Answer 10

digestive, circulatory, respiratory and reproductive organs

Question 11

the mantle cavity in the mollusc usually houses the ____

Answer 11

gills/lung

Question 12

in most molluscs, the mantle secretes a _____ over the visceral mass

Answer 12

shell

Question 13

what is an odontophore

Answer 13

supporting cartilage that the radula sits on top of

Question 14

what is the periostracum

Answer 14

outer organic layer of the shell, composed of conchiolin

Question 15

what is the inner narceous layer

Answer 15

next to the mantle in molluscs, laid down in thin layers and becomes thicker with age

Question 16

how are pearls formed in molluscs

Answer 16

when small objects get caught within the mantle, the nacre secretes mucous in and secretes a peal to reduce irritation

Question 17

what is torsion

Answer 17

twisting of the viscera

Question 18

when does torsion occur in moluscs

Answer 18

in the embryonic stage, anus gets twisted towards the anterior side

Question 19

what is a disavantage of torsion in molluscs

Answer 19

anus comes out the mantle cavity where the lungs are, this can have complications

Question 20

What is the difference between Oligochaeta and Hirudinea

Answer 20

Oiligochaetes have setae, leeches have suckers

Question 21

what is a characteristic that all annelids share (ancestral state)

Answer 21

parapodia: small paddle like assemblages

Question 22

what is a chractersitic that all Oligochaeta and Hirunida share

Answer 22

Clitellum: larger part of the body that contains the organs

Question 23

what are setae?

Answer 23

small hairs, anchors that help push them through the soil in order to prevent backwards movement

Question 24

what are some characteristics of class Hirudinea

Answer 24

dorso-ventrally flattened, posterior sucker, parasitic and predatory forms, not all are parasites nor do all drink fluids

Question 25

all Hirudinea have exactly ___ segments

Answer 25

34

Question 26

T or F: most leeches are freshwater

Answer 26

T

Question 27

class hirudinea lack distinct ______ departments

Answer 27

coelomic

Question 28

what is the suphylum hexapoda

Answer 28

class insecta

Question 29

what is the class malacostracta

Answer 29

crayfish and shrimps

Question 30

what is the class ostracoda

Answer 30

seed shrimps

Question 31

what is the class brachiopoda

Answer 31

fairy shrimps, cladocerans (daphnia)

Question 32

what is the subclass copepoda

Answer 32

important zooplanktons~

Question 33

what are two characteristics that all arthropods share

Answer 33

compound eye, chintinous exoskeleton with articulated appendages, need ot shed their exoskeleton to grow

Question 34

what is a distinct chracteristic between hexopoda and crustacea

Answer 34

shared derived DNA sequences

Question 35

what is the order hemiptera

Answer 35

"true bugs", piercing sucking mouth parts

Question 36

what is the order diptera

Answer 36

flies and mosquitoes, complete metamorphasis

Question 37

what is metamorphasis

Answer 37

complete larval form to adult form

Question 38

what is the order odonata

Answer 38

dragonflies and damselfies; aquatic nymphs, flying adults

Question 39

what is the difference between anisoptera and zygoptenra

Answer 39

Anisoptera-dragonflies Zygoptera-damselfies when dragonflies are at rest their wings are spreadout, dansleflies at rest are vertical

Question 40

what is ephemeroptera

Answer 40

mayflies,

Question 41

what order is a good indicator of water quality

Answer 41

mayflies

Question 42

what is the order trichoptera

Answer 42

caddis flies, construct nets and cases

Question 43

what is hte order plecoptera

Answer 43

stone flies, 1-4 years as a nymph, 1-4 weeks as an adult

Question 44

what is the order megaloptera

Answer 44

dobson flies

Question 45

what is the order isopoda

Answer 45

pill bugs!!

Question 46

T or F: Arthropods usually have 2 body segments

Answer 46

T

Question 47

what are some arthropod body plan characteristics

Answer 47

visible segmentation, usually one pair of appendages in each segment

Question 48

what is a disadvantages of the arthropod body plan

Answer 48

when they molt they are at risk of predation and damage

Question 49

what is the role of the procuticle in arthropods

Answer 49

to control moisture loss

Question 50

what are some characteristics of the subphylum chelicerata

Answer 50

6 pairs of legs, no mandibles, get their name from their feeding appendages, chelicerae, have pair of pedipalps- sensory function

Question 51

what are some characteristics of the subphylum crustacea

Answer 51

only primarily aquatic arthropod group, 2 body segments, contain carapace, extrashell over the front half of the body

Question 52

what are some characterstics of the subphylum hexapoda

Answer 52

3 tagmata, 1 pair of anennae, 1 pair of mandibles, 1 pair maxillae, 3 pairs of walking legs

Question 53

what are mandibles and maxillae used for

Answer 53

mandibles used for crushin, maxillae for chewing

Question 54

what are the two classes of subphylum hexapoda

Answer 54

entognatha (inner mouth + wingless) and insecta (visible mouth, winged or wingless)

Question 55

what is a chracteristic all insecta share

Answer 55

ectognathous mouthpart

Question 56

what separates neoptera from paleoptera

Answer 56

wings fold back over body for neoptera

Question 57

The study by Chin et al. was conducted where

Answer 57

stony creek watershed bordering yukon and northwest territories

Question 58

The study by Chin et al. collected macroinvertebrates how?

Answer 58

3 minute travelling kick and sweep

Question 59

T or F: The study by Chin et al. found that richness had a lot of variance

Answer 59

F

Question 60

T or F: The study by Chin et al. found a negative relationship between abundance and TSS

Answer 60

T

Question 61

T or F: The study by Chin et al. found a positive relationship between bundance and TP

Answer 61

F

Question 62

T or F: The study by Chin et al. found a positive relationship ebtween abundance and distance to disturbance

Answer 62

T

Question 63

T or F: The study by Chin et al. found that thaw slumps increase TSS, TN and TP

Answer 63

T

Question 64

T or F: The study by Chin et al. found that thaw sumps have a significant impact on diversity

Answer 64

F

Question 65

T or F: The study by Chin et al. found that thaw slumps increase abundance

Answer 65

F