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Darwin's Observations in Galapagos & Evolution Basics

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Darwin's Observations in Galapagos & Evolution Basics

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Questions and Answers

What did Darwin observe about the finches in the Galapagos Islands?

They were a different species altogether

They had no beaks at all

They had differently shaped beaks according to their location and food availability (correct)

They had the same shaped beaks regardless of their location

What is the definition of evolution?

A change in the frequency of a trait in a population over time (correct)

A change in the frequency of a gene in an individual over time

A change in the frequency of a gene in a population over time

A change in the frequency of a trait in an individual over time

What is a gene pool?

A collection of genes from all individuals in a population

A collection of chromosomes from all individuals in a population

A collection of alleles from all individuals in a population (correct)

A collection of traits from all individuals in a population

What is the mechanism of evolution that results from a drastic decrease in population size?

Genetic Drift Signup and view all the answers

What is the difference between genetic bottleneck and founder effect?

Genetic bottleneck is a disaster that limits a population, while founder effect is when a few individuals leave their original population to make a colony Signup and view all the answers

What is fitness in the context of evolution?

The ability to survive and reproduce Signup and view all the answers

What is the primary mechanism of evolution that introduces new genes into the gene pool?

Mutations Signup and view all the answers

What is the process by which a population becomes reproductively isolated and forms a new species?

Allopatric speciation Signup and view all the answers

What is the condition in which a population's allele frequencies remain the same over time?

Genetic equilibrium Signup and view all the answers

What is the main reason for speciation to occur?

Reproductive isolation Signup and view all the answers

What type of isolation occurs when two populations reproduce at different times?

Temporal isolation Signup and view all the answers

What is the term for the selection of mates based on heritable traits, such as size, strength, or coloration?

Sexual selection Signup and view all the answers