Giraffes evolved over many generations to have long necks. giraffes that had longer necks were more likely to survive than giraffes with shorter necks because they had better access to food. this is an example of . giraffes are also vertebrates, like humans. in fact, despite their different neck sizes, humans and giraffes have exactly seven vertebrae bones in their neck. this similarity suggests human and giraffe necks are

Natural Selection and Homologous Structure.

Explanation: The ancestors of the giraffe had small necks and when the short heighted bushes and shrubs were finished by them then there was evolution of giraffe's neck.

The neck of the giraffe became long and long neck giraffes were naturally selected.

Despite the long neck sizes of giraffes and short neck sizes of human beings the vertebrae are same in both the organism due to homologous structure.

Natural Selection and Homologous Structure.

Explanation:

well

explanation:

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.