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WorksheetsWhat is Evolution & Mechanisms of Evolution
Total questions: 25
Worksheet time: 21mins
The central idea of evolution is that life has a history. The living things on Earth have __________ __________ __________, and that the different species on Earth today share common ancestors.
Evolution is possible because of... __________ _________. If a population was 100% the same... the processes that cause evolution would have NO effect because the genetic make-up would never change.
Genetic Variation
Natural Selection
Mutation
Adaptation
What causes evolutionary change? 1. (a) - A change in a DNA sequence. The ultimate source of genetic variation.
__________ - Any movement of individuals, and/or the genetic material they carry, from one population to another.
migration
mutation
selection
drift
The change of allele frequencies in a population over time due to RANDOM events forming successive generations.
What is genetic drift?
What is natural selection?
What is gene flow?
What is mutation?
4. __________ - A process of evolution in which traits that result in better fitness of an individual survives to the next generation.
Natural Selection
Genetic Drift
Mutation
Gene Flow
5. __________ - brings together a new combination of genes. Introduces new combinations of genes every generation.
Which of the following is a mechanism of evolution?
Mutation
Gene Flow
Genetic Drift
All of the above
Although evolution cannot be seen on the small scale of individuals, the works of evolution are occurring all the time in ________________.
individual organisms
ecosystems
populations
species
The picture shows which mechanism of evolution?
(a)
A giraffe has a long neck in order to better reach leaves to eat. This is an example of _____.
an adaptation
environment
response
stimulus
What could cause a species to go extinct?
Food becomes more plentiful.
The environment changes drastically and no-one can adapt.
There is less competition for resources.
Members of a species have adaptations to enhance survival.
Different forms of the same gene
Allele
Adaptation
DNA
Which of the following is NOT an example of natural selection?
People selectively breeding hamsters.
Insect populations developing resistance to certain pesticides.
On a farm, Marcia observes that individuals of a certain goat species have slightly different sizes and colors. What characteristic of populations is Marcia observing?
adaption
evolution
selection
variation
What does "Survival Of the Fittest" mean?
The best adapted organisms
The biggest organisms
The fastest organisms
The smartest organisms
The best way for a species to survive:
Be scary as possible
Wild colors
Huge teeth
Fit its environment
