Biol 441 Final Flashcards
1
Q
Changes that occur when tadpoles metamorphose into frogs (8)
A
Tail is lost Extra set of legs develop Eyes develop new pigments and nerves, and move to the front of the head Intestines shorten Gills are lost Lungs develop Nitrogen waste products are changed Skeleton is changed
2
Q
Examples of metamorphosis (6)
A
Tadpole → Frog Caterpillar → Butterfly Pluteus → Sea urchin Sea squirt tadpole → sea squirt adult Bilateral starfish larvae → Radial starfish adult Fly larvae → Fly adult
3
Q
Thyroxine
A
Stimulates amphibian metamorphosis
Metabolic hormone in higher vertbrates
4
Q
Ecdysone
A
Major insect molting hormone
Promotes metamorphosis in insects
5
Q
Juvenile hormone (JH)
A
Prevents insect metamorphosis
6
Q
Epidermis origin
A
Ectoderm (surface)
7
Q
Peripheral nervous system origin
A
Neural crest (ectoderm)
8
Q
Brain origin
A
Neural tube (ectoderm)
9
Q
Kidney origin
A
Intermediate mesoderm
10
Q
Cartilage origin
A
Paraxial mesoderm
11
Q
Heart origin
A
Lateral plate mesoderm
12
Q
Stomach origin
A
Endoderm
13
Q
Dermis origin
A
Paraxial mesoderm
14
Q
Hair origin
A
Ectoderm (surface)
15
Q
Melanocyte origin
A
Neural crest (ectoderm)
