Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating a planet.
Answer:
Ventilation is the movement of a volume of gas into and out of the lungs. Respiration is the exchange of oxygen and carbon dioxide across a membrane either in the lungs or at the cellular level.
Explanation:
Answer:
Recent research examined clinical applications using silk because of its ability to promote adhesion and proliferation of various cells including keratinocytes and fibroblasts[12,13]. In this study, we found silk dressing materials effective as burn dressing.
Explanation:
Answer:
Animals: eukaryotes. plants: chloroplast.
Explanation:
animals have eukaryotic cells.
while plants have chloroplast that helps in photosynthesis.
