This is true! Minerals were mined both on the surface as well as in mines and caverns underground.
A rapid heart rate and accelerated breathing
Answer:
Explanation but if im wrong correct me
Answer:
The Cardiovascular System
Explanation:
The respiratory system draws air into the lungs. Oxygen diffuses through the walls of the alveoli and across the walls of the capillaries where it enteres the bloodstream. The oxygen molecules are picked up by red blood cells, which are pumped through the blood vessels by the action of the heart. As the red blood cells carrying oxygen pass through capillaries near the cells, oxygen diffuses into the cells.
Answer:
The invention of the microscope
Explanation:
<em>The invention of the microscope and the ability to see organisms that are otherwise invisible to the ordinary eye led to the establishment of Monera and Protista kingdoms</em>.
<u>Organisms in the Monera and Protista kingdom are microscopic and the invention of the microscope created and avenue for them to be studied extensively by scientists.</u>
Through their studies, taxonomists discovered that these microscopic organisms have characteristics that are neither of plants nor of animals.
<em>Some organisms were found to lack nucleus and membrane-bound organelles which is unlike plants and animals. Some were also found to posses most of the characteristics of animals except that they are unicellular.</em>
These led to the establishment of the Monera and Protista kingdoms respectively.