From which substrate is the first carbon dioxide molecule released during cellular respiration?

a. glucose

b. pyruvate

c. acetyl coa

d. citrate (a c6 intermediate compound in the krebs cycle)

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point