What is the primary mechanism of evolution according to the study material?
Natural selection
Genetic drift refers to random changes in allele frequencies over generations.
True
Match the evolutionary mechanism with its definition:
Natural Selection ↔️ Differential survival and reproduction
Genetic Drift ↔️ Random changes in allele frequencies
Gene Flow ↔️ Movement of genetic material
Mutation ↔️ Changes in DNA sequence
The differential survival and reproduction of individuals with advantageous traits is called natural selection
Genetic drift results from the movement of genetic material between populations.
False
Arrange the steps of natural selection in the correct order:
1️⃣ Variation within populations
2️⃣ Struggle for existence
3️⃣ Differential survival and reproduction
Individuals within a population are identical in their traits.
False
Why is variation within populations essential for natural selection to occur?
It provides traits for selection
Natural selection depends on the inheritance of traits
What does the struggle for existence refer to in the context of natural selection?
Competition for resources
Natural selection is the process by which certain traits become more or less common in a population over time
Match the evolutionary mechanism with its definition:
Natural Selection ↔️ Differential survival and reproduction due to advantageous traits
Genetic Drift ↔️ Random changes in allele frequencies
Gene Flow ↔️ Movement of genes between populations
Mutation ↔️ Changes in the DNA sequence of genes
Natural selection relies on the inheritance of traits from parents to offspring.
True
Genetic drift is driven by competition for limited resources within a population.
False
Match the evolutionary mechanism with its definition:
Natural Selection ↔️ Differential survival and reproduction due to advantageous traits
Genetic Drift ↔️ Random changes in allele frequencies
Gene Flow ↔️ Transfer of genes between populations
Mutation ↔️ Changes in the DNA sequence of genes
Giraffes evolved long necks through natural selection because they could reach higher leaves for food.
True
Order the principles of natural selection based on their logical sequence:
1️⃣ Variation within populations
2️⃣ Inheritance of traits
3️⃣ Struggle for existence
4️⃣ Differential survival and reproduction
What feeding advantage did giraffes with slightly longer necks have?
Reaching higher leaves
Natural selection favors individuals with advantageous traits that enhance their survival and reproductive success
Variation within populations is a key principle of natural selection.
True
What is the struggle for existence in natural selection?
Competition for resources
What does genetic drift refer to?
Random changes in allele frequencies
Natural selection results in differential survival and reproduction due to advantageous traits
Match the evolutionary mechanism with its definition:
Mutation ↔️ Changes in the DNA sequence of genes
Gene Flow ↔️ Movement of genes between populations
Genetic Drift ↔️ Random changes in allele frequencies
The fossil record is one type of evidence for natural selection.
True
The fossil record provides a chronological sequence of extinct species, showing transitions over time
Natural selection is the differential survival and reproduction of individuals with advantageous traits
How do advantageous traits contribute to survival and reproduction in natural selection?
Increases survival rates
Natural selection leads to random changes in populations over time.
False
What happens to traits that confer an advantage in a population over time?
They become more common
What is the primary outcome of natural selection on a population?
Evolution
Variation within populations arises from genetic mutations and sexual reproduction
What contrasts natural selection with other evolutionary mechanisms?
Its reliance on traits
Natural selection acts randomly on populations to drive evolution.
False
Match the evolutionary mechanism with its example:
Natural Selection ↔️ Dark moths in polluted areas
Genetic Drift ↔️ Loss of a rare allele
Gene Flow ↔️ Cross-pollinating plants
Mutation ↔️ A new trait emerges
What is the primary mechanism of evolution according to the study material?
Natural selection
Natural selection refers to random changes in allele frequencies within a population.
False
One key principle of natural selection is variation within populations.
What does the struggle for existence refer to in natural selection?
Competition for resources
Differential survival and reproduction occur when individuals with more advantageous traits are more likely to reproduce and pass on their genes to the next generation.