Question

1. yeast is a single - celled organism that undergoes fermentation in the preparation of bread. which products are produced by the yeast undergoing fermentation?

a. carbon dioxide and ethanol
b. ethanol and lactic acid
c. sugar and carbon dioxide
d. lactic acid and carbon dioxide

1. which situation would most likely be a driving force for changes in a species?

a. reduced diversity due to geographic isolation
b. increased mating events due to environmental stability
c. increased resources due to favorable weather conditions
d. reduced offspring production due to asexual reproduction methods

1. north carolina has more wind off its shore than any other atlantic coast state. how could this resource be best utilized to reduce carbon emissions and provide cleaner energy for the state?

a. windmills could be installed to pump water to coastal cities and provide fresh water to nearby houses.
b. windmills could be installed on roofs in the coastal region to generate energy for nearby houses and businesses.
c. offshore wind farms could be constructed to change wind patterns so that hydroelectric turbines turn more quickly.
d. offshore wind farms could be constructed to generate wind energy, which reduces fossil fuel use throughout the state.

1. a certain strain of bacteria used to be susceptible to penicillin. today, that strain is resistant to penicillin. which best explains this observation?

a. the bacteria needed to become resistant to survive.
b. the isolation of the strain caused it to become resistant.
c. a mutation occurred and was passed to future generations.
d. the mutation rate in the bacteria population greatly increased.

1. through which type of reproduction does natural selection work most effectively over time to influence differences in size, coloration, and ability to fight diseases within a species?

a. asexual reproduction
c. bud cell production
b. sexual reproduction
d. spore production
open response: a population of beetles is mostly composed of individuals with the dominant green color, several with the recessive brown color. a displaced species of bird moves into the habitat and prefers the green beetles. over time, what can be expected to happen to the beetle population?

Explanation:

1. Yeast performs alcoholic fermentation, breaking glucose into carbon dioxide and ethanol.
2. Geographic isolation reduces gene flow, creating selective pressures that drive species change as isolated populations adapt to local conditions.
3. Offshore wind farms harness the strong coastal wind to generate renewable electricity, cutting fossil fuel reliance and carbon emissions.
4. Random bacterial mutations created penicillin resistance, and these resistant bacteria survived to pass the trait to offspring.
5. Sexual reproduction creates genetic diversity, which natural selection acts on to drive long-term species trait changes.
6. The birds prey on green beetles, so brown beetles have higher survival and reproductive success. Over time, the brown recessive trait will become more common in the beetle population as the green beetle population declines.

Answer:

1. a. Carbon dioxide and ethanol
2. a. reduced diversity due to geographic isolation
3. d. Offshore wind farms could be constructed to generate wind energy, which reduces fossil fuel use throughout the state.
4. c. A mutation occurred and was passed to future generations.
5. b. sexual reproduction
6. The brown beetle proportion will increase as green beetles are preyed upon, shifting the population's dominant color to brown over time.