To view space and the foreign objects scientist may find. Also for learning purposes because it financially cost a lot to send scientists to space for research. So for research purposes.
Answer:
Human has 4 chambers, and most reptiles have 3 chambers in their heart
Explanation:
your question in Romanian translated roughly What is the difference between a human and reptile circulatory system?
Answer:
C. the medulla oblongata, which is in contact with cerebrospinal fluid, monitors pH and uses this measure to control breathing.
Explanation:
The central chemoreceptors are located near the medulla inside the blood-brain barrier. When CO2 in cerebrospinal fluid increases, pH of the fluid lower (because CO2 becomes hydrated to carbonic acid). Change in pH stimulates the central chemoreceptors to activate respiratory centers which will increase the respiratory rate and depth of breathing.
The correct answer would be A. yes, but it is only produced at night when plants can no longer carry on photosynthesis.
Explanation:
This is because when the sun rises Photosynthesis starts which carbon dioxide is taken in and oxygen is given out.
