Introduction:
In this lab, you will investigate how organisms inherit traits.
Objectives:
• explain that every organism requires a set of instructions that specifies its traits
• explain the difference between dominant and recessive traits or alleles
• recognize phenotype as the physical expression of the genotype
• recognize genotype as the collective sum of all alleles and their specifying traits
• analyze animals to demonstrate evidence of the hereditary information that is passed from one generation to another

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

carbon atoms, hydrogen, oxygen, and nitrogen.

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