Explain how much the post-hurricane birds varied from the original birds after 1 million years of natural selection. How do adaptations and natural selection explain the changes? Use the following terms or phases in your explanation: natural selection, random mutation, nonrandom selection of favorite traits, reproduction, genetic variation, and extinction. Be sure to identify the trait you were following in your opening statement.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.