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Biology 004 is an overview of life science. In this course I learned that photosynthesis is
the process of converting light energy to chemical energy and storing it in the bonds of sugar.
Thisprocess occurs in plants and some algae. Plants need sunlight energy, carbon dioxide
(CO2), and water ( H2O) to make sugar. The process of photosynthesis takes place in the
chloroplasts,specifically using chlorophyll, the green pigment involved in photosynthesis, as
well as in plant leaves. Photosynthesis is important because it powers almost all food webs on
the Earth. Additionally,photosynthesis is a crucial for all aerobic life on earth, as well as
maintaining the normal level of oxygen in the atmosphere. The chemical reaction involved in
photosynthesis is: 6CO2 + 6H2O (+ lightenergy) C6H12O6 + 6O2. During the course of this
class, I also learned that the food chain is a representation of the predator –prey relationships
between living organisms in nature. The foodchain constitutes of five organisms: producers,
primary consumers (herbivores), secondary consumers (carnivores), tertiary consumers, and
decomposers. Plants are called producers because they areable to use light energy from the
sun to produce food (sugar) from carbon dioxide and water. Animals cannot make their own
food so they must eat plants and/or other animals. They are calledconsumers. There are three
groups of consumers: primary consumers (herbivores), secondary consumers (carnivores), and
tertiary consumers. Primary consumers (herbivores) are animals that eat only plants.Insects
and mammals such as elephants, cattle, and sheep are examples of herbivores. Secondary
consumers (carnivores) are animals that feed on the herbivores. Examples of carnivores includesnakes, tigers, bears, and alligators. Tertiary consumers are those carnivore animals that eat
other carnivores that eat other carnivores. For example, killer whales, hawks, and seals, are
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