How do biological systems respond when acids or bases are added? O Cells produce different molecules that can function at the new pH levels.

O Most biological molecules can function at any pH value.

O They have substances that counteract acids or bases to prevent the pH from changing

O Biological systems do not experience any changes in pH.

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

How can you approximate the number of calories required to keep you in energy balance?

The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.