It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.
The ultimate source of energy (for most ecosystems) is "the sun"<span>. The ultimate fate of energy in ecosystems is for it to be lost as heat. Energy and nutrients are passed from organism to organism through the food chain as one organism eats another. Decomposers remove the last energy from the remains of organisms.
Hope this helps!</span>
All the offspring would be white because there are no other alleles other than the ones for white (two f alleles only for both parents = only f allele available)
<span>waves moving into shallow water churning up sand, which then deposits in the form of a submarine bar when the waves break and lose much of their energy. </span>
Have a wonderful day and be safe :$
