A population of beetles is surviving by eating the flowers of one particular species of plant in a meadow and the beetles do not leave the meadow because they can’t fly very far. The meadow is sprayed with herbicide and those plants all die. Almost all of the beetles then die of starvation. The few that survive to happen to have longer wings and they are able to fly off and make it to another meadow where there are still some of the plants surviving. There they start a new colony which now has beetles with long wings.
Explain what is happening in evolutionary terms Include one or more words from: directional natural selection, disruptive natural selection, stabilizing selection, gene flow, migration, bottleneck, founder effect, genetic drift. Read carefully and give the best interpretation.
The case of beetles is an example for theory of natural selection proposed by darwin.
1. by the use of herbicide resource for beetles got limited for the present beetles in the meadow.
2. this condition leads to struggle for existence.
hence some of the beetles died.
3. thus they migrate to another meadow.
4. survival of the fittest & natural selection
in the struggle for the resources, only fittest ones survived. ie, those with large wings who flyoff to another meadow.
5. inheritence of usefull characters.
thus the new character ie, long wing was inherited to next generation.
6. speciation occurs.
A population of beetles is surviving by eating the flowers of one particular species of plant...
Below is a list of several scenarios that have occurred in our natural world. Read the situation carefully and identify the type of selection taking place. Explain why you choose your answer. Stabilizing selection Genetic Drift Directional selection Heterozygote Advantage Disruptive selection Bottleneck Founder effect Underdominance A) After a chemical plant moves into town near a meadow, local downwind populations of plants begin to adapt to the resulting air pollution. Scientists document that the acid rain tolerance of several plant...