Why do problems with the heart lead to difficulty breathing?
a. the heart is the organ that brings carbon dioxide from the air.
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b. the circulatory and respiratory systems work together
c. the pumping action of the lungs moves oxygen through the body.
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d. the lungs transfer white blood cells to the heart.

1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)