No a solution is not a combination a combination is when you combine something
Answer:
The circulatory system has evolved over time from simple diffusion through cells, in the early evolution of animals, to a complex network of blood vessels that reach all parts of the human body. Made of specialized and unique cardiac muscle, it pumps blood throughout the body and to the heart itself.
Claps shut at birth. Evolutionary changes in the vertebrate heart are tied to change from single to double-circuit heart, with increased separation of oxygenated and deoxygenated blood, allowing more efficient respiration and circulation to fuel high activity and increased oxygen demands associated with endothermy.
<span>Spanish authorities in Cuba were accused of atrocities against the people.</span>
The leaf needs the sun to grow and gain energy. the insect then eats the leaf and gets its nutrition and energy.
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Homozygous means having identical piars of genes for any given pair of heredity characteristics.
heterozygous means an individual having two different alleles for a specific trait.
