Flowers and pollinating insects are examples of <span>coevolution. </span>
Answer:
The continental crust is thicker than the
oceanic crust.
He had a bacterial infection, but then developed an allergy to the antibiotic.
The correct answer is: Heartburn often results when the gastroesophageal sphincter fails to close properly.
The gastroesophageal sphincter is a muscle located at the bottom of the esophagus that has to be relaxed in order to allow food to flow down into the stomach. After it contracts (tightens), the food and the stomach acid can’t flow back up into the esophagus.
When the gastroesophageal sphincter fails to close properly acid reflux occurs and causes the heartburn.
Answer:
B
Explanation:
a sex cell made through meiosis
