1. Anuran
2. Lepidosiren
3. Apodan
4. Urodae
Apodan
1. connective tissue
2. nervous tissue
3. muscle tissue
4. epithelial tissue
nervous tissue
1. acquired characters are not inherited
2. accumulation of small variations is not possible
3. large variations are harmful
4. many animals possess characteristics of inutility and even those that are positively harmful
many animals possess characteristics of inutility and even those that are positively harmful
1. epidermal scales and tail
2. epidermal scales and gills
3. tail and venous heart
4. venous heart and gills
venous heart and gills
1. 3
2. 2
3. 1
4. 4
3
1. Ostrea
2. Pila
3. Sepia
4. Chiton
Sepia
1. optic capsules
2. olfactory capsules
3. laryngotracheal chamber
4. auditory capsules
auditory capsules
1. precystic stage
2. trophozoite stage
3. mature quadrinucleate cyst
4. none of the above
precystic stage
1. lateral line
2. operculum
3. mucus
4. middle car
operculum
1. Echinodermata
2. Crinoidea
3. Asteroidea
4. Ophiuroidea
Ophiuroidea