Pistil is the part if the flower that contains the ovary
Cyanobacteria are also very often referred to as "blue-green algae" because they are photosynthetic and aquatic in nature. They are important in the ecology as they help in forming the earth's oxygen atmosphere. Many oil deposits are attributed to the activities being performed by this group of microorganisms.
It would most likely be A. 10grams considering grams is the smallest and we are talking about a feather.
