Nylon-eating bacteria were discovered growing in ponds containing waste products from a nylon manufacturer. Further study revealed that the enzymes the bacteria used to digest the waste products were different from enzymes produced by other bacteria. Also, the enzymes were not effective on any material other than the nylon waste products. Nylon is an artificial product that was invented in 1935. What does this information MOST likely suggest about the development of the bacteria?
Select one:

a. Bacteria that can digest nylon have a reproductive advantage in the pond.

b. The availability of food forced a change in the living things in the area.

c. Bacteria can create enzymes to digest anything in their environment.

d. Natural selection eliminated the other bacteria in the pond ecosystem.

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins