Answer:External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.
Explanation:
Answer:
Step 1 of the formation of the solar system. the solar nebula collapses.
Step 2 of the formation of the solar system. rotating protostellar disk.
Step 3 of the formation of the solar system. center of nebula fusion begins, star is born.
Step 4 of the formation of the solar system
Explanation:
C. monosaccharides is a compound that is a building block for DNA
usually this is the measuring device of amount of rain fall.
you can buy these, but most of the time meteorologists will have these to measure the amount of rain fall
This invention helped them to discover a basic similarity among organisms.
Hope this helps<3
