Introduction: In this lab you will apply what you have learned about succession to the ecological changes that occur in an abandoned hay field. After only 5 years, several types of trees have begun to grow
where there was once only hay. You will observe, by counting, the number and types of trees that grow in
this field 5, 20, 50 and 100 years after abandonment.
Procedure A: For each figure 1-4, count how many of each species of tree are found in the field, using
the key as a guide. Add up all of the trees to find the total number of trees. You will then calculate the
percentage of each tree species at each observed time period. Use the following formula: Number of
specific free - TOTAL number of trees =
X 100 =
%

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

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