<span>a change in observations that challenge existing knowledge</span>
The endosymbiont theory explain that the mitochondrian and endoplasmic recticlum present in plant and animal are descendant of some symbiosis bacteria
Answer:a
Explanation:because there is only one option
Answer:
The sneeze centre sends signals to the parts of your body that need to work together to help you sneeze. Your chest muscles, diaphragm, abdominals, vocal cords and the muscles in the back of your throat all work together to help you expel the irritant. Muscular, immune, nervous, respiratory.
Explanation:
Answer:
false
Explanation:
phytoplankton are found in water