Emir is most probably taking a class on human anatomy. Human anatomy involves all the structures in the composition of the human body. Human anatomy can be studied either by systems (i.e. cardiovascular system, respiratory system, etc.) or by regions (i.e. thoracic anatomy, abdominal anatomy, pelvic anatomy, head and neck anatomy, etc.) depending on the course.
D. Organisms specialized for living in a particular niche.
The dark reaction of photosynthesis is called the Calvin cycle or Calvin - Benson cycle.
It is a series of chemical reactions that occur in chloroplasts during photosynthesis.
It is also known as the light - independent phase because it happens after light energy ahs been absorbed from the sun.
It is named after scientist called Melvin Calvin who was the winner of a Nobel prize in chemistry for finding how this cycle works way back in 1961, at the university of California.