Question

consequences of dna technology
why might genetically engineering a crop to be herbicide resistant result in producing weeds that are herbicide resistant?
the dna in herbicide resistant crops does not affect insects.
the weeds that are not affected by the herbicide are able to reproduce.
the weeds will become tolerant to the herbicide through repeated exposure.
insects that are not affected by the herbicide can pollinate new species of weeds.

Explanation:

When a crop is genetically engineered to be herbicide - resistant, herbicides are used more frequently. Weeds that are not affected by the herbicide (due to some inherent genetic variation or mutation) have a survival advantage. In a natural selection - like process, these surviving weeds can reproduce. Their offspring will inherit the trait that makes them resistant to the herbicide. Over time, this leads to an increase in the population of herbicide - resistant weeds.

Answer:

The weeds that are not affected by the herbicide are able to reproduce.