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NHS-Biology Review#1

Biology Review 15-16

What is the gradual, sequential regrowth of a community of species after a forest fire? Secondary Succession
An example of a feedback mechanism that maintains the equilibrium of your body temperature when your surroundings are very hot is Heat receptors in the skin send a message to the brain. The brain sends the skin a response telling the skin to start sweating. Sweat cools the body.
Which cellular structure is unique to plant cells and not found in bacterial cells? Chloroplasts
In the immune system, inflammation occurs when a pathogen enters the body. How does the inflammatory response act as a defense against infection? Histamine is released, increasing blood flow and bringing white blood cells to fight the infection.
Which type of evidence provides the best support for the hypothesis that the ancestors of tetrapods (amphibians, reptiles, and mammals) evolved legs before tetrapods were first seen on land? Fossil record
Miller and Urey exposed hydrogen gas, water vapor, ammonia, and methane gases to sparks in a reacting chamber. What was produced, giving support to certain hypotheses about how life began on Earth? Organic compounds
a loose combination of DNA and proteins Chromatin
one half of a duplicated chromosome Chromatid



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