You can infer that the birds once had a common ancestor but became separated. Mutations in copying their genes stacked and caused changes in the beaks so the birds could be more well off or better adapted in their new environment.
The question should be about active vs passive range of motion.
In the active range of motion, the test is done by asking the patient to move their body themselves. In this case, the patient should use their muscle to move their body. If there is a restriction in this examination, it could be caused by the muscles or the joints, or the nervous system that used to contract the muscle.
In the passive range of motion, the test is done by the examiner moving the patient body. Since no muscle used, the test shouldn't be influenced much by the muscle. Then, if there is an articular joint issue, the restriction would be found in both passive and active ROM, but the nonarticular joint issue might only cause abnormality in the active ROM.
True
Explanation:
Besides using fossils, a geologist who needs to correlate two rock formation in different areas can use key beds for his work.
Key beds are very distinct layers that has a large geographical range.
- Correlation is the process of matching rock sequences across different terrains.
- This is usually done using index fossils and key beds.
- Key beds are good indicators of homogeneity in an area.
learn more:
Fossils brainly.com/question/12790206
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