The Veins carry blood to the heart
Answer:The Great Oxygenation Event, which occurred around 2.45 billion years ago, was probably the first major extinction event. Since the Cambrian explosion, five further major mass extinctions have significantly exceeded the background extinction rate.
Explanation:
got this from the internet very helpful :)
Answer:
products
Explanation: Substances present BEFORE a reaction occurs are described as reactants. Substances present AFTER a reaction has occurred are described as products
From the energy of photons(light).
Photons give their energy to electrons and through the processes of the light reactions and electron is added to NADP+ to become NADPH.