The respiratory and circulatory system both work together <span>to get oxygen to a cell in your knee: the respiratory system brings the oxygen into the body and for the circulatory system, the heart pumps red blood cells to deliver oxygen to locations throughout your body. Hope this helps! :)</span>
D. Homozygous dominant because the dad has the dominant allele.
Answer: C
The substance that must come through the cell membrane for the cell to live is nutrients. Cells would die if they did not get nutrients. Nutrients are what keeps the cell running.
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.
