Uring a trip to the supermarket, jim bought the following items: bread $1.45 beans $0.88 toothpaste $2.90 milk $3.55 dog food $6.50 the state in which he lives levies a 6% sales tax on all items except food for human beings. what was jim’s total bill?

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

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