Genetic drift, a significant force in evolution, exerts varying effects depending on population size. Which of the following accurately describes the impact of genetic drift on small populations?
It has minimal impact as allele frequencies remain relatively stable.
It increases genetic diversity by introducing new alleles through random mutations.
It leads to a significant decrease in genetic diversity and can fix alleles, even deleterious ones.
It promotes adaptive evolution by selectively favoring beneficial alleles.
Related Questions
Give the name of the first organism who invaded land
Plants
Consumers
Animal
Carnivores
Which of the following is not a correct pair?
Mesozoic era - Age of mammals
Origin of species - Charles Darwin
Study of fossil – Palaeontology
Mutation theory – Hugo de Vries
The process by which organisms better suited to their environment survive and reproduce is called:
Mutation
Natural selection
Genetic drift
Migration
Which of the following is NOT a key factor driving evolution?
Natural selection
Genetic drift
Mutations
Static environmental conditions
Primary source of allelic variation is
Due to long periods of evolutionary changes
Due to abrupt mutations
Suddenly on earth
By seed dispersal
First seed plant appeared during which period?
Silurian
Devonian
Carboniferous
Cretaceous
In which era Protozoa, sponge and algae were originated?
Cenozoic era
Azoic era
Precambrian era
Mesozoic era
Which of the following is the LEAST likely explanation for the relatively rapid diversification of mammals following the Cretaceous-Paleogene extinction event?
Release from competition with dinosaurs
Release from predation by dinosaurs and other large reptiles
Adaptive radiation into newly available ecological niches
Increased mutation rates in mammals
Which of the following is not a correct pair?
Mesozoic era - Age of mammals
Origin of species - Charles Darwin
Study of fossil – Palaeontology
Mutation theory – Hugo de Vries
The greatest evolutionary change enabling the land vertebrates to be completely free from the water was the development of
Four legs
Four-chambered heart
Lungs
Shelled eggs and internal fertilization
