The
Blood<span> moves in the heart through two large veins, the
inferior and superior vena cava, and exhausting oxygen-poor blood from the body into the right atrium. The pulmonary vein discharges oxygen-rich blood, from the lungs into the left atrium.</span>
They are generally LARGE.....
Answer:
energy is lost in the food chains so many secondary consumers cannot be supported
Answer:
A theory is a reasonable explanation of the phenomena observed in nature, with much evidence to support it (option C).
Explanation:
A theory gathers a set of hypotheses that can be demonstrated and constituted on a scientific basis, until they are questioned by other evidence.
To construct a theory, the processes of observation, deduction and investigation must be thorough, but leave open the possibility of being discussed and refuted in the absence of definitive arguments.
<u>A theory becomes law when it has been proven beyond a doubt</u>.
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