The red blood cell is normally circular shaped but for sickle cell anemia the red blood cell is literally sickle shaped so the surface area decreases and less amount of oxygen is stored by the sickle shaped cell thus resulting in low O2 content
A yeast cell is a single celled organism whereas an onion cell is part of a multicellular organism
If the shape of this unknown skull is long and skinny at the cheekbones, then it is most likely an Australopithecus afarensis one
Convection currents are identified in Earth's mantle. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks, creating a convection current.
