Why are most leaves shaped the way they are?

The shape of a tree's leaves are a response to the tree species' long term ecological and evolutionary histories. ... A leaf must "capture" sunlight for photosynthesis (and as it does this it may also absorb a great deal of heat!) 2. A leaf must take in carbon dioxide from the surrounding air via pores (called "stomatae").

Explanation:

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.