Answer:
Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing. Rhizomes are sinks when growing but become sources in the spring when they provide energy for new growth.
Cancer or cell death could happen I got it right in my test
Wood tissue (witch in more detailed stans for shell, bone, and teeth)
Biosphere. Bio means life, and Biosphere means ALL life on earth.
D because it reflects all other colors
