LAB 5

Question 1

what are the key characteristics of crustacea

Answer 1

triploblastic, bilateral symmetry, segmeted, jointed appendages, eucolomate, exoskeleton and loss of circular and longitudinal muscle sheets

Question 2

what type of skeleton do crustaceans have

Answer 2

hard chitinous sexoskeleton with musculature between individual joints of appendages

Question 3

what produces the exoskeleton

Answer 3

the epidermis

Question 4

crustaceans have biramous appendages true or false

Answer 4

true

Question 5

what is the tagmata of crustaceans

Answer 5

head (cephalon), thorax and abdomeneach with multiple segments

Question 6

the true coelom in crustaceans is not reduced true or false

Answer 6

false - true coelom is reduced surrounding the heart and gonads

Question 7

reproduction in crustaceans

Answer 7

crustaceans are gonochoristsic - separate sexes and they reproduce by a freeswimming larval stage

Question 8

what is the first stage of larvae in crustacean

Answer 8

nauplius

Question 9

what are the other stages of larvae in crustaceans

Answer 9

cyprid, zoea, phyllosoma

Question 10

what are the three main regions of the digestive system

Answer 10

foregut, midgut and hindgut

Question 11

what is the main body cavity

Answer 11

hemocoel which is part of the open circulatory system with an ostiate heart

Question 12

do crustaceans have simple or compound eyes

Answer 12

compound

Question 13

crustraceans dont have a carapace or cephalic shield

Answer 13

false

Question 14

how do crustaceans respirate

Answer 14

respiration across brachial surfaces (gills)

Question 15

how do crustaceans excrete

Answer 15

excretion via nephridial structures (antennal or maxillary glands)