Living Thing Biology
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Living Thing Biology
Living things make up the world as we know it. Living things are involved in our
life constantly, seeing that we are alive. There are five characteristics that
are common to all living things. Living things are made up of one or more cells.
Each cell is made up of living matter and is separated by a barrier that
encloses the cell from its surroundings. However, there are many different kinds
of cells that make up living things. A single cell can be one organism. These
organisms are known as unicellular. Most of the organisms that we know best such
as people, trees, and dogs are all made up of more than one cell. Organisms made
of more than one cell are said to be multicellular. Another characteristic that
living things share is that they reproduce. They reproduce, or make new
organisms of the same sort. In order for a species to survive, it is a necessity
for them to reproduce because all organisms die eventually. There are two ways
living things reproduce, sexually and asexually. Sexual reproduction needs two
cells from two different organisms to merge and form the first cell of a new
organism. Asexual reproduction is when only one organism can reproduce without
the assistance of another. The third characteristic of living things, is that
all living things need to grow and develop. When an organism is growing, most go
through a cycle called development. The single cell that starts the cell divides
over and over again to make all the cells that the organism has when in
adulthood. As the cycle continues the organism ages. Aging is when the organism
becomes less efficient in the process of life. The organism will not be able to
reproduce, and death comes as finally too. The fourth characteristic of a living
thing is the ability to obtain and use energy. Living things obtain energy from
their environment or their surroundings. All living things require energy to
live and build their cells. This process is anabolism. Anabolism is the process
in a living thing that involves putting together complex substances from simpler
substances. Plants get their energy from the sunlight through a process called
photosynthesis. Animals get their energy from food that is eaten. The food is
then broken down through digestion, resulting in a release of energy called
catabolism. Living things practice anabolism and catabolism through the whole
time they are living. The balance of anabolism and catabolism is called
metabolism. The fifth and final characteri...
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