I think that the best phrase to fit into the blank is a "scientific theory".
A scientific theory is developed through experiments which use the scientific method, and a theory can be improved if additional data is available or if people provide suggestions which make the theory fit the data better.
Answer:
spiders
Explanation:
While humans and many other species have red blood, due to the iron in their hemoglobin, other animals have different colored blood. Spiders(as well as horseshoe crabs and certain other arthropods) have blue blood due to the presence of copper-based hemocyanin in their blood. Some animals, such as the sea cucumbers, even have yellow blood.
<span>3.2 inches. The nurse if doing a cardiopulmonary resuscitation. It is an emergency procedure combines with chest compression and artificial ventilation. It is done during a cardiac arrest. When doing so the nurse should compress the lower sternum by 3.2 inches.</span>
Answer:
Cervical and Thoracic areas.
Explanation:
The most common sites of injury are the cervical and thoracic areas. SCI is a common cause of permanent disability and death in children and adults. The spine has 33 vertebrae.
