Mechanisms of Evolutionary Change
Biology ⇒ Evolution and Diversity
Mechanisms of Evolutionary Change starts at 10 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Mechanisms of Evolutionary Change.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A population of 100 birds has 60 with allele A and 40 with allele a. If 10 birds with allele a migrate to another population, what mechanism of evolution is this?
A population of beetles is mostly green, but a few are brown. After a flood, only brown beetles survive. What mechanism of evolution is this an example of?
A population of plants is exposed to a new herbicide. Over time, only those with a rare resistant allele survive and reproduce. What type of selection is this?
A population of rabbits has 60% white fur allele (W) and 40% black fur allele (w). If a disease randomly kills half the population, and the surviving group has 80% W and 20% w, what mechanism of evolution has occurred?
A population of 100 birds has 60 with allele A and 40 with allele a. If 10 birds with allele a migrate to another population, what mechanism of evolution is this?
A population of beetles is mostly green, but a few are brown. After a flood, only brown beetles survive. What mechanism of evolution is this an example of?
A population of plants is exposed to a new herbicide. Over time, only those with a rare resistant allele survive and reproduce. What type of selection is this?
A population of rabbits has 60% white fur allele (W) and 40% black fur allele (w). If a disease randomly kills half the population, and the surviving group has 80% W and 20% w, what mechanism of evolution has occurred?
Which mechanism of evolution can introduce new alleles into a population from another population?
(1) Mutation
(2) Gene flow
(3) Genetic drift
(4) Natural selection
Which mechanism of evolution is most likely to cause a population to become better adapted to its environment?
(1) Genetic drift
(2) Mutation
(3) Natural selection
(4) Gene flow
Which mechanism of evolution is most likely to increase genetic variation in a population?
(1) Natural selection
(2) Mutation
(3) Genetic drift
(4) Bottleneck effect
Which of the following best describes gene flow?
(1) The movement of alleles between populations
(2) The random change in allele frequency
(3) The process of natural selection
(4) The formation of new species
Fill in the blank: __________ is the only mechanism of evolution that consistently leads to adaptation.
Fill in the blank: __________ selection occurs when individuals at one extreme of a trait distribution have higher fitness than others.
Fill in the blank: The __________ effect occurs when a small group of individuals establishes a new population, leading to reduced genetic diversity.
Fill in the blank: The change in allele frequencies in a population due to random chance is called __________.
True or False: All evolutionary changes are adaptive.
True or False: Evolution always leads to more complex organisms.
True or False: Evolution can occur without natural selection.
True or False: Gene flow tends to make populations more genetically similar to each other.
