Jawed fishes Flashcards
1
Q
Sharks have ____ for increase surface area in the digestive tract
A
Spiral valve
2
Q
The rectal gland excretes
A
NaCl
3
Q
Rays swim by
A
flapping pectorals
4
Q
Skates swim by
A
Undulating pectorals
5
Q
Subclass holocephali
A
Ratfish =chimaera
6
Q
Chrondrostei
A
Sturgeons
7
Q
Ampullae of lorenzini
A
Sensitive to weak electri fields
8
Q
Oviparous
A
eggs laid outside the mothers body
9
Q
Ovoviviparous
A
Mother retains eggs in utuerus, embryo Nourished by egg yolk
10
Q
Viviparous
A
embryos develop in the uterus nourished by egg yolk
11
Q
Viviparous
A
embryos develop ino the uterus nourish by the mothers blood through a placenta
12
Q
Sturgeon
A
Cartilaginous skeleton Heterocercal tail Bony scutes 4 barbels toothless
13
Q
Thermoregulation
A
Ectotherms
Metabolic heat
ambient temperature
14
Q
hypo osmotic
A
replace lost water by drinking seawater
15
Q
hyper osmotic
A
excess water excreted in a dilute urine
