Campbell Essential Biology with Physiology by Eric J. Simon

By Eric J. Simon

Campbell crucial Biology with body structure, Fourth version, makes biology irresistibly attention-grabbing for non-majors biology scholars. This best-selling booklet, identified for its medical accuracy and foreign money, makes biology proper and approachable with elevated use of analogies, genuine international examples, extra conversational language, and exciting questions.

 

Campbell crucial Biology with Physiology … make biology irresistibly interesting.

 

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Insulin is a chemical that helps regulate your body’s use of sugar as a fuel. Some people who have the disease diabetes must regulate their sugar levels by injecting themselves with insulin, which is produced by genetically engineered bacteria. These bacteria can make insulin because a gene for human insulin production has been transplanted into their DNA. 6). And it is only possible because biological information is written in the universal chemical language of DNA. The entire “book” of genetic instructions that an organism inherits is called its genome.

1 Biosphere Earth’s biosphere includes all life and all the places where life exists. 2 Ecosystems An ecosystem consists of all living organisms in a particular area and all the nonliving components of the environment with which life interacts, such as soil, water, and light. 3 Communities All organisms in the tide pool (iguanas, crabs, seaweed, bacteria, and others) are collectively called a community. 4 Populations Within communities are various populations, groups of interacting individuals of one species, such as a group of iguanas.

This dependence on observations that other people can confirm demystifies nature and distinguishes science from belief in the supernatural. Science can neither prove nor disprove that angels, ghosts, deities, or spirits, whether benevolent or evil, cause storms, rainbows, illnesses, or cures, for such explanations are outside the bounds of science. 14). In our quest to describe nature accurately, we discover its structure. In biology, discovery science enables us to describe life at its many levels, from ecosystems down to cells and molecules.

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