Which statement describes the redox reaction involved in photosynthesis? A. CO2 is removed from the atmosphere, and O2 is released.
B. O2 is removed from the atmosphere, and CO2 is released.
C. It is a combustion reaction in which energy is released.
D. It transfers energy to ATP molecules so energy can be transferred.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

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.