Question

1. what is the main benefit to using genetically modified organisms, even though their use has sparked an ethical debate around the world?

a. humans can produce more insulin naturally.
b. fewer pharmaceutical products are produced.
c. farm products have a more pleasing appearance.
d. fewer pesticides are released into the environment.

1. how is inheritance related to the process of natural selection?

a. it promotes mutations of genetic material over time.
b. it restricts the flow of dna from one generation to the next.
c. it reduces competition for mates and increases genetic continuity.
d. it allows beneficial traits to be passed from generation to generation.

1. a river changes course so a population of mice is subdivided into two populations. the forest on the eastern side of the stream contains a land predator that is absent on the western side of the stream. which outcome will most likely occur in the mice populations over many generations?

a. mice on the western side of the stream will have better camouflage
b. mice on the eastern side of the stream will have a different number of chromosomes.
c. the two groups of mice will develop different adaptations.
d. the two groups of mice will continue to eat the same food.

1. these images show two different cells.

how are these cells classified?
a. cell 1 is prokaryotic, cell 2 is eukaryotic
b. cell 1 is eukaryotic, cell 2 is prokaryotic
c. cell 1 and 2 are both prokaryotic
d. cell 1 and 2 are both eukaryotic

1. the development of heart disease is based on a genetic trait. which action may delay the onset of the disease?

a. eating only organic vegetables
b. restricting strenuous physical activity
c. limiting the amount of protein consumed
d. consuming a diet that is low in sodium and fats
(open response: a vast national park has a highway running through the middle of all animals found in a northern woodland ecosystem. many animals crossing the highway are killed. a team of scientists proposes to fence the highway and build a series of wildlife crossings on both sides of the park. the structures would include bridges and tunnels landscaped to match the natural environment as animals cross over or under the highway. what is one benefit of these structures? what is one possible unintended consequence to animal populations from these structures?)
(note: the open response question is partially visible at the bottom.)

Explanation:

1. GM crops are often engineered to be pest-resistant, so farmers need fewer pesticides, which is the primary large-scale benefit despite ethical debates. Option a is incorrect because GMOs are used to produce insulin synthetically in bioreactors not make humans produce more naturally, b is wrong as GMOs increase pharmaceutical production, c is a minor aesthetic benefit not the main one.
2. Natural selection depends on beneficial heritable traits being passed between generations so favorable characteristics persist in a population. a is wrong because inheritance does not promote mutations, b is incorrect as inheritance facilitates DNA flow between generations, c does not describe the core link between inheritance and natural selection.
3. The two mouse populations are geographically isolated with different selective pressures (predator on eastern side). Over time, they will evolve distinct adaptations suited to their local environments. a is wrong because western mice have no predator pressure favoring camouflage, b is unlikely as chromosomal number changes are rare, d is not guaranteed as food sources may diverge.
4. Cell 1 has a membrane-bound nucleus and organelles so it is eukaryotic. Cell 2 lacks membrane-bound organelles and has free floating DNA so it is prokaryotic.
5. A low sodium, low fat diet reduces cardiovascular strain, which can delay the onset of genetically predisposed heart disease. a is unnecessary, b is wrong as moderate exercise helps prevent heart disease, c is incorrect as adequate protein intake is healthy for heart function.

Answer:

1. d. Fewer pesticides are released into the environment.
2. d. It allows beneficial traits to be passed from generation to generation.
3. c. The two groups of mice will develop different adaptations.
4. b. Cell 1 is eukaryotic, cell 2 is prokaryotic
5. d. consuming a diet that is low in sodium and fats