Answer: Amphibians: X, X, ✅, ✅
Birds: X, ✅, X, ✅
Fish: X, X, ✅, ✅
Mammals: ✅, ✅, X, ✅
Reptiles: ✅, X, ✅, ✅
Explanation: I researched I hope this is correct. Btw this what should be on your paper. This is not grading what is correct or what is right.
Answer:
nucleus : control activities in the cell. 2, vacuoles: it allows substances in and out of the cell.
Answer:
An index fossil is also known as guide fossils or indicator fossil. They are fossils used to determine and identify geologic periods.
The main characteristics of an index fossil include :
1.It must be distinctive.
2.It must be widespread.
3. It must be abundant
4. It must be limited in geologic time.
Due to trends and studies of most fossil-bearing rocks being formed in the ocean, the major index fossils are mostly marine animal or plant organisms.
Answer:
homologous structures adapted to different purposes as the result of descent with modification from a common ancestor