Answer:
Blood vessels constrict
Explanation:
On seeing danger, impulses are sent to the adrenal medulla. It responds by secreting adrenaline into the bloodstream. This results in the following:
- Increased heartbeat
- Diversion of blood from alimentary canal and skin to skeletal muscles.
- Increased breathing rate and depth
- The liver releases more glucose.
These changes increase energy production especially in the skeletal muscles and prepare animal for sudden fight or flight.
The trait that was found in von Meyer's discovery is possession of feathers
<h3>What was von Meyer's 1861 discovery?</h3>
In 1861, the German Palenteologist von
Meyer discovered a fossil known as Archaeopteryx.
The Archaeopteryx possessed belongs to the time period of the dinosaurs.
The special feature of feathers possessed by Archaeopteryx served as evidence for the evolution of birds from dinosaurs.
Therefore, the trait that was found in von Meyer's discovery is possession of feathers.
Learn more about Archaeopteryx at: brainly.com/question/4657862
