Question

evolution and natural selection

1. complete the following paragraphs with terms from the word bank.

caracterstica dna gene pool generation genetic drift
migration offspring population reproduction survival of the fittest
a change in a populations over time is called biological evolution.
there are four primary mechanisms of biological evolution. mutations are accidental changes
in an organisms occurs when individuals
immigrate into or emigrate out of a(n) biological evolution that
happens by chance is called natural selection is the process by which
traits that improve an organisms chances for survival and are passed
on more frequently to a future than those that do not.
natural selection follows three conditions: organisms produce more
than can survive; individuals of a species vary in their and lastly
individuals vary in their fitness. natural selection is also known as

1. explain how a gene pool and biological evolution are related.

1. how could a natural disaster result in genetic drift?

1. explain what survival of the fittest means.

how does artificial selection provide evidence for evolution by natural selection?

Explanation:

• 1. Completing the Paragraphs:
• Gene Pool: Biological evolution is defined as a change in a population's gene pool over time.
• DNA: Mutations are accidental changes in an organism's DNA.
• Migration: Migration occurs when individuals immigrate into or emigrate out of a population.
• Genetic Drift: Biological evolution that happens by chance is called genetic drift.
• Reproduction: Traits that improve an organism's chances for survival and reproduction are passed on more frequently.
• Generation: They are passed on to a future generation.
• Offspring: Organisms produce more offspring than can survive.
• Characteristics: Individuals of a species vary in their characteristics.
• Survival of the Fittest: Natural selection is also known as survival of the fittest.
• 2. Relationship between Gene Pool and Biological Evolution: A gene pool is the sum of all the genes in a population. Biological evolution is a change in the gene pool over time. As genes mutate, migrate, or are subject to genetic drift or natural selection, the composition of the gene pool changes, which is the essence of biological evolution.
• 3. Natural Disaster and Genetic Drift: A natural disaster can drastically reduce the size of a population (bottleneck effect). By chance, the genes of the surviving individuals (a non - representative sample of the original gene pool) will be passed on to the next generation. This random change in the gene pool due to the disaster is an example of genetic drift.
• 4. Meaning of Survival of the Fittest: It means that organisms with traits that are better adapted to their environment are more likely to survive, reproduce, and pass on those advantageous traits to their offspring. Over time, these favorable traits become more common in the population.

Answer:

1.

• gene pool
• DNA
• Migration
• population
• genetic drift
• reproduction
• generation
• offspring
• characteristics
• survival of the fittest

1. A gene pool is the collection of all genes in a population. Biological evolution is a change in this gene pool over time. Changes in the gene pool (due to mechanisms like mutation, migration, genetic drift, and natural selection) constitute biological evolution.
2. A natural disaster can reduce the population size (bottleneck effect). The surviving individuals' genes (a random subset of the original gene pool) are passed on, causing a random change in the gene pool (genetic drift).
3. Organisms with traits that make them better adapted to their environment are more likely to survive, reproduce, and pass on those traits. These favorable traits become more common in the population over time.