1. Mammals reached a peak of diversity
2. Reptiles reached a peak of diversity
3. Reptiles were dominant
4. Birds were dominant
Mammals reached a peak of diversity
1. Azoic
2. Proterozoic
3. Palacozoic
4. Coenozoic
Azoic
1. Obligatory reabsorption
2. Facultative reabsorption
3. Active reabsorption
4. All of these
Facultative reabsorption
1. Fishes
2. Reptiles
3. Birds
4. Mammals
Mammals
1. Filter
2. Bellow
3. Sponge
4. Suction pump
Filter
1. Anuria
2. Polyuria
3. Oligourea
4. Floating kidney
Oligourea
1. sex-linked gene
2. sex limited gene
3. holandric gene
4. duplicate gene
holandric gene
1. Sulphate
2. Glucose
3. Creatine
4. Water
Creatine
1. gene for characters are located on the sex chromosome
2. the trait is domiant in males and recessive in females
3. the Y-chromosomes of male have genes for distinguish colours
4. None of the above
gene for characters are located on the sex chromosome
1. Diffusion
2. Ammonification
3. Degradation
4. Uricotelism
Diffusion