Carbon dioxide moves out of the tissues (cells) into the bloodstream to be exhaled in internal respiration.
The correct answer among the choices listed above is the first option. The number of growth rings is an indicator of the age of a woody plant. A growth ring a concentric layer of wood which is developed on a regular period of growth of a plant.
<span>The correct answer is attenuated live vaccine.</span>
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Attenuated live vaccines are vaccines that use a weakened or attenuated form of the viruses or bacteria that causes a disease. Viruses or bacteria are given in a relatively small dose to replicate in the vaccinated person and to stimulate an immune response. They create a strong and long-lasting immune response but the limiting factor is that there is a possibility for a virus to revert to a form which is capable of causing disease.</span>
Yes natural selection is a factory theory
