MCQ Bank
What do paleontologists study?
- A) Climate
- B) Fossils
- C) Ecosystems
- D) Living organisms
What could be a long-term result of gene flow between two geographically isolated populations?
- A) New species evolve
- B) Equal allele distribution
- C) Genotype extinction
- D) Increased divergence
What does p² represent in the Hardy-Weinberg equation?
- A) Allele frequency of recessive
- B) Mutation rate
- C) Heterozygous genotype frequency
- D) Homozygous dominant genotype frequency
Convergent evolution produces:
- A) Homologous structures
- B) Analogous structures
- C) Vestigial organs
- D) Recombinant chromosomes
What is meant by the term “gene pool”?
- A) The total number of species in an ecosystem
- B) The complete set of genes in a population
- C) Genes that are passed on from environment
- D) A place where genes are stored
Which of the following processes affect both microevolution and macroevolution?
- A) Photosynthesis
- B) Erosion
- C) Natural selection and mutation
- D) Plate tectonics
Which process is mainly responsible for the evolution of sexual dimorphism?
- A) Environmental shift
- B) Migration
- C) Sexual selection
- D) Genetic mutation
What happens when a DNA portion is deleted from a chromosome?
- A) It removes genes and disrupts function
- B) It results in protein elongation
- C) It initiates DNA repair
- D) It duplicates all genes
What is the gene pool of a population?
- A) The most common alleles in a species
- B) The sum of all genes present in all individuals of a population
- C) Only dominant genes in a population
- D) All the genotypes of a few individuals
What is genetic variation?
- A) Variation in diet of organisms
- B) Differences in the genetic makeup within a population
- C) Mutation in only plant species
- D) Differences in height among species
What is adaptive evolution?
- A) Selection of beneficial alleles for survival
- B) Increase of deleterious alleles
- C) Elimination of all alleles
- D) Mutation of gametes only
What is the primary source of genetic variation?
- A) Environmental factors
- B) Mutations
- C) Breeding techniques
- D) Nutrition
If blue eye color becomes a desirable trait in a population, what is likely to happen?
- A) Blue eye allele frequency will increase
- B) Blue eye alleles will disappear
- C) Eye color becomes neutral
- D) Brown eye alleles will dominate
What is the earliest evidence of life on Earth found in geological records?
- A) Coral reefs
- B) Trilobite fossils
- C) Dinosaur bones
- D) Microbes in rocks
Which populations are most affected by genetic drift?
- A) Genetically engineered populations
- B) Small populations
- C) Isolated populations
- D) Large populations
What is the primary cause behind the evolution of drug-resistant bacteria?
- A) Misuse of antibiotics
- B) Increased humidity in the environment
- C) Use of vaccines
- D) Genetic engineering
Which of the following best defines an index fossil?
- A) A fossil that shows evidence of soft tissues
- B) A fossil found in igneous rocks
- C) A fossil found only in mountain regions
- D) A fossil that is typical of a specific geological period and found widely
Which of the following describes macroevolution?
- A) Genetic changes in a single generation
- B) Evolution of dog breeds
- C) Evolution of humans from unicellular organisms
- D) Color changes in moths during industrialization
What is the term used when heterozygotes have higher fitness due to a single locus?
- A) Overdominance
- B) Incomplete dominance
- C) Codominance
- D) Polymorphism
Which of the following is not a main source of genetic variation?
- A) Sexual reproduction
- B) Mutation
- C) Rapid reproduction
- D) Photosynthesis