Molecules * 2 points
a. react with acids and bases to keep pH in a range
b. made from repeating units of mostly identical compounds
c. group of atoms held together by covalent bonds
d. measures hydrogen ion concentration
e. what is being dissolved
f. macromolecule that gives us quick energy
g. macromolecule that builds and repairs
h. what is doing the dissolving
i. long chains of repeating subunits, called nucleotides
j. contain unequal areas of charge
k. building blocks of proteins
l. repeating subunits composed of carbon, nitrogen, oxygen, phosphorus, and hydrogen
m. large molecules formed by joining smaller organic molecules
n. have high concentration of hydrogen ions
o. have high concentration of hydroxide ions
p. another name for homogenous mixture

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Clues to ecological principles are given in numerous passages of the bible. a bible study of ecology actually opens the doors to better understanding of god's love and concern for the earth. use a concordance to locate bible passages associated with words concerning our stewardship of the earth. you may use a dictionary to find synonyms for these words: dominion replenish subdue judgment stewardship find each of the passages using these words related to principles of ecology. list all passages by quote, book, chapter, and verse under each word. use your own interpretation to rewrite what you think each verse is saying. after your discussion of each of these words, ask one other person to explain his understanding of the word and a related verse without any hints. summarize what he tells you. a concluding paragraph for each of the words should be written noting similarities and differences between your interpretation and that of each person consulted.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?