Positive hydrogen ions form during the steps of photosynthesis. What are these lons made of? (1 point) a proton and an electron
a single proton
two protons and an electron
a proton and two electrons

answer: that would be cheating

explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

to this one it would be receptive field

the answer is true ; ) have a good day