Question

tell if each example is: natural selection selective breeding genetic engineering

1. insecticides are designed to kill bugs that destroy crops. after many years of use, some bugs begin to show signs that the insecticides arent effective.

a natural selection b selective breeding c genetic engineering

1. penguins with extra layer of fat survive and reproduce.

a natural selection b selective breeding c genetic engineering

1. dogs such as the labrador are bred for specific traits.

a natural selection b selective breeding c genetic engineering

1. male peacocks with long, bright feathers attract more females to mate.

a natural selection b selective breeding c genetic engineering

1. scientist modified watermelons to produce a version that is seedless and sweeter.

a natural selection b selective breeding c genetic engineering

1. a gene is inserted into a species of corn that makes it more drought resistant.

a natural selection b selective breeding c genetic engineering

1. lab retrievers are valued for their ability to swim and retrieve birds. over the years they have been bred for webbed feet to help swimming

a natural selection b selective breeding c genetic engineering

1. pecan trees take 10 - 15 years before they begin to produce a good crop. scientists have been able to insert a gene in their dna to make them produce sooner

a natural selection b selective breeding c genetic engineering

1. cheetahs on the african savannah often look for slow, weak or wounded animals to hunt

a natural selection b selective breeding c genetic engineering

1. hemingway cats have a mutation that gives them 6 toes. this has become popular among people in key west. these cats are now bred for the 6 toe trait

a natural selection b selective breeding c genetic engineering

Explanation:

1. Insects surviving insecticides is natural selection: resistant individuals survive, reproduce, and pass on traits.
2. Penguins with extra fat surviving/reproducing is natural selection, driven by environmental pressure.
3. Dogs bred for specific traits is selective breeding, human-directed trait selection.
4. Peacocks with attractive feathers mating more is natural selection, as traits boost reproductive success.
5. Modified seedless/sweeter watermelons are genetic engineering, direct DNA modification by scientists.
6. Inserting a drought-resistance gene in corn is genetic engineering, targeted genetic alteration.
7. Lab retrievers bred for webbed feet is selective breeding, human-driven trait selection.
8. Inserting a gene in pecan trees is genetic engineering, direct DNA modification.
9. Cheetahs hunting weak prey drives natural selection, as weaker individuals are removed from the population.
10. Breeding cats for 6 toes is selective breeding, human selection of a desired trait.

Answer:

1. A. natural selection
2. A. natural selection
3. B. selective breeding
4. A. natural selection
5. C. genetic engineering
6. C. genetic engineering
7. B. selective breeding
8. C. genetic engineering
9. A. natural selection
10. B. selective breeding