Phylum Mollusca - Cephalopoda Flashcards
1
Q
what does this class include?
A
squids,cuttle fishes,nautilus
2
Q
is radula present or absent?
A
present in the buccal cavity
3
Q
“a pair of horny beak like jaws are present” true or false
A
true
4
Q
shell is external and multi chambered in?
A
nautilus
5
Q
shell is internal in?
A
sepia and loligo
6
Q
shell is absent in?
A
octopus
7
Q
shell of sepia is known as?
A
cuttle bone
8
Q
shell of loligo is known as?
A
pen
9
Q
foot is modified into 8 arms in?
A
octopus
10
Q
foot is modified into 10 arms in?
A
sepia and loligo
11
Q
ctaenidia,atria and nephrida are 2 in?
A
dibranchiates (sepia)
12
Q
ctaenidia,atria and nephrida are 4 in?
A
tetrabranciates(nautilus)
13
Q
circulatory system is opened or closed?
A
closed
14
Q
is the nervous system well developed or not?
A
well developed with a brain enclosed in a cranium
15
Q
monoecious or dioecious?
A
dioecious
