BIOLOGY 1B Lecture Notes - Lecture 8: Main Source, Invertebrate, Raymond Lindeman
Document Summary
Food chain: big things eat smaller things which eat smaller things, in turn. All organisms need to acquire carbon and synthesize organic molecules in order to survive and reproduce. Food chain starts with organisms that produce their won food: autotrophs, and the energy is passed on by organisms eating them and one another. According to darwin, in the english countryside, bumblebees are the only insect with a tongue that is long enough to pollinate red clover flowers. Bumblebees are consumed by field mice which destroy bumblebee hives. Field mice, in turn, are eaten by house cats, and mice are more rare around towns where cats are kept. The little mountain shrimp does not make its own food, so it must rely on an autotroph for nutrition, and the chain could be extended at least one more level downward. to both aquatic and terrestrial systems. Food chains exist in all communities, and a common terminology can be applied.
