WorksheetsY10 Natural Selection Revision
Total questions: 19
Worksheet time: 17mins
This makes an organism more suited to its environment
species
lifespan
adaptation
mutation
Natural Selection
Variation
Homeostasis
Extinction
According to natural selection, organisms more suited to their environment are better able to
Sleep
Survive
Perish
Migrate
Mutations can be inherited or be
Chosen by the individual organism
Caused by environmental factors
Refused at any time
The table shows the survival rate of two types of beetles in the same environment over a period of three years.
Based on the table, which statement is correct?
Brown beetles have a shorter life cycle than green beetles have
Green beetles are more fit for their environment than brown beetles
Brown beetles undergo more unfavorable mutations than green beetles
Green beetles do not have the adaptations suited for survival in this environment
Which species' DNA is most similar to the DNA of the toothed whale?
Common ancestry can also be seen in the developing embryos of most vertebrates. This is called:
DNA studies
embryology
extinction
fossil record
In this example of natural selection, what environmental factor is acting as a selection force - or environmental pressure - on the giraffe?
Food is found on tree tops
Having a long neck
Being cursed with beauty
Having spots that act as camouflage
Evolution is
a trait that helps an organism reproduce
the ability to survive and reproduce
changes in organisms over time
organisms that have better suited traits survive
What is an acquired trait?
a trait influenced by the environment
a trait you are born with
a trait that is in the DNA of an organism
a trait that is passed from parent to offspring
A mechanism which maintains a favourable characteristic and eliminates variants and abnormalities that are useless or harmful.
Stabilising selection
Directional selection
Disruptive selection
Balancing selection
A result of changing environmental conditions. The majority of an existing form of an organism may no longer be best suited to the environment- a different characteristic may become more prevalent.
Stabilising selection
Directional selection
Disruptive selection
Balancing selection
Can lead to the formation of two new species- occurs when particular environment conditions favour the extremes of a phenotypic range over intermediate phenotypes.
Stabilising selection
Directional selection
Disruptive selection
Balancing selection
Reorder the following To best explain the process of natural selection
Populations have variation caused by mutations
More individuals produced than can survive in an environment
Selection pressures ensure that only those adapted to the environment survive
Those organisms are able to reproduce passing on the beneficial characteristic
Over time organisms become better adapted to their environment "survival of the fittest
