Worksheets3.1 Conditions for natural selections
Total questions: 70
Worksheet time: 53mins
What is the process where animals live or die based on their adaptations to their environment.
Genetic Drift
Natural Selection
The Circle of Life
Mammoth
Which word describes the word "variation"?
Adaptations
Differences
Traits
Genetics
According to natural selection, light colored tree trunks would favor
light colored moths
dark colored moths
red colored moths
red and light colored moths
A fox with thicker fur than average would have a survival advantage over other foxes if:
There is more competition for food in the fox population.
The air temperature significantly decreases in winter.
A drought occurs, limiting the amount of water available.
A new disease appears that infects the foxes.
The phrase "Survival of the Fittest" would best describe...
Natural selection
Artificial selection
Selective breeding
None of the above
Speciation can occur as a result of geographic isolation because _________.
members of a species can no longer find mates
populations that live in different environments may be exposed to different selection pressures
exchange of genes during recombination
movement of genes within a population because of interbreeding
How does natural selection lead to evolution?
By individuals choosing to change their characteristics
Through random changes that happen without any reason
By beneficial adaptations becoming more common in a population over generations
By all members of a species evolving at the same rate
The father of evolution is
Jean Baptiste Lamarck
Charles Darwin
Gregor Mendel
Rbbert Hooke
Which natural selection step is described? A spider lays thousands of eggs.
overproduction
genetic variation
struggle to survive
successful reproduction
Which natural selection step is described? A shark eats the fish that has shorter fins and cannot swim as fast.
overproduction
genetic variation
struggle to survive
successful reproduction
Which natural selection step is described? Iguanas on the Galapagos Islands may look the same, but some have stronger jaws, some swim faster and others have longer claws.
overproduction
genetic variation
struggle to survive
successful reproduction
Choose all the causes of a species becoming extinct:
over hunting or over harvesting
deforestation
natural environmental changes
All of the plants compete for room in the canopy of the forest to get the most sunlight.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
Organisms produce more offspring than can survive
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
Individuals born with better traits are more likely to "win" and survive.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
Offspring are genetically different and have slightly different traits.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
There is a competition for available resources.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
There are many kittens in a litter.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
All of the antelope are different. Some have longer legs and are faster than others.
Overproduction
Variation
Struggle to Survive
Survival of the Fittest
Inheritance of Traits
Select the best answer based on the image.
Gene Flow
Genetic Drift
What are any difference between organisms of the same species
Homologous Structure
Diversity
Fossil
Variation
Which moth is better adapted to an environment with light trees?
Look at the Image below. Which grasshoppers are going die faster in a green field? (a)
In this example, the variation is the (a) and the adaptation is the (b) . This is because of the selecting agent, the (c) . Therefore, the short neck giraffes will be (d) . On the other hand, the long neck giraffes will be (e)
camoflouge
The ability to blend in with your surroundings
antibiotics
A medicine that kills disease causing bacteria
variation
A difference among species that allows some to better survive
Darwin
The first person to recognize genetic variations
mutation
A change in an organisms DNA
The (a) mice will survive over the (b) mice because they can camouflage. Over time, there will be a (c) black mice and (d) tan mice.
The differences between the wings of these moths, which are all the same species, is an example of (a)
Natural Selection
Variation
Homeostasis
Extinction
Match the following terms to their definitions:
Describes the differences in DNA among individuals within a species
Genetic Variation
The formation of new and distinct species through the course of evolution.
Speciation
The selective breeding of plants and animals to promote the occurrence of desirable traits in offspring
Artificial Selection
A change in the allele frequency of a population as a result of chance events rather than natural selection.
Genetic Drift
Random errors in gene replication that lead to a change in the sequence of nucleotides. These are the source of all genetic diversity and new alleles.
Mutations
If Easter eggs were living species of organisms, their different colors would be considered:
Adaptations
Variations
Different species
Extinct species
Males of the bighorn sheep species fight one another to show females who is the dominant male and are more likely to mate with females.
Natural Selection
Mutation
Genetic Drift
Non-Random Mating
Insects become resistant to pesticides very quickly, sometime in one generation. If an insect is resistant to the chemical, most of the offspring will also be resistant. Considering that insect generations can be a matter of weeks, insects in an area can become immune to a chemical within months.
Mutation
Natural Selection
Genetic Drift
Gene Flow
A chemical spill causes the offspring of ladybugs to have blue dots instead of black dots.
Natural Selection
Genetic Drift
Mutation
Gene Flow
In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs
Genetic Drift
Natural Selection
Gene Flow
Mutation
Females a certain bird species are attracted to the mating calls of male species more than others
Genetic Drift
Mutation
Non-Random
Natural Selection
Which combination of characteristics in a population would provide the greatest potential for evolutionary change?
Small population, low mutations rates
Large population, low mutation rates
Small population, high mutation rates
Large population, high mutation rates
Bats are common in Texas, especially in rocky regions. Bats with longer hang claws have demonstrated higher fitness because of their ability to cling to rock while resting. This adaptation is becoming more frequent in the population. What mechanism of evolution is this?
Natural Selection
Non-random mating
Gene Flow
Genetic Drift
Organism
Population
Community
ecosystem
biosphere
This is one of the mechanisms of evolution; it is a continuous process in which organisms with traits that make them better-adapted to their environment are more likely to survive and reproduce than organisms without such adaptations
Directional selection
Microevolution
Gene flow / genetic drift
Natural selection
Humans have changed physically over millions of years. (a) is a change in a species over the span on many generations.
When the environment changes, a helpful physical trait that helps an organism survive can be called an (a)
Match the following scenarios to the cause of evolution it describes
light colored animals living in a dark habitat are easily observable and are preyed upon more quickly; over generations, their fur color becomes darker
natural selection
various breeds of horses were created by selective breeding
artificial selection
millions of years ago a brown bear's offspring had a defective gene which prevented it from creating fur pigmentation; now polar bears exist
mutation
a landslide kills off a large part of a plant population; the population's gene pool is greatly changed and future generations lack genetic diversity
genetic drift
Evolution works on (a) NOT on (b)
Which of the following statements about mutations is true?
All mutations are beneficial
Mutations occur in response to environmental changes
Mutations are random changes in the DNA sequence
Mutations are always harmful
What is the role of mutations in evolution?
They always harm the organism
They provide genetic variation for natural selection to act upon
They prevent speciation
They eliminate genetic diversity
Which of the following is an example of a mutation?
A bird learning to sing a new song
A change in the DNA sequence of an organism
A plant growing towards the light
A predator hunting its prey
Evolution can be described as changes in a (a) over (b) .
The rock pocket mouse lives in the black rocks of Arizona. Due to genetic mutations, the fur color of the mouse has evolved to a dark color. This mutation has increased the survival and reproduction of the species as they are able to hide better from predators.
This type of mechanism of evolution is called ________________.
Natural Selection
Genetic Drift
Gene Flow
Mutations are a change in what?
DNA
tRNA
protein
rRNA
Plants need light for photosynthesis. If a seedling grows quickly it can reach the sunlight more easily. Over time, the number of fast growing seedlings will (a) and the number of slow growing seedings will (b) .
Humans have changed physically over millions of years. (a) is a change in a species over the span on many generations.
What term describes the process by which organisms with traits best suited to their environment are more likely to survive and reproduce?
Mutation
Natural Selection
Gene Flow
Extinction
Adaptations can be:
camouflage
ability to survive cold weather
hunting skills
all of the above
Differences in traits are called:
natural selection
genetic variations
artificial selection
adaptations
A species could go extinct if:
food becomes more plentiful.
members of the species have adaptations to enhance survival.
the environment changes drastically and no one can adapt.
there is less competition for resources.
What is most likely to happen to moth populations in the picture shown?
Light moths--hunted easily, dark moths--population increase
Dark moths--hunted easily, dark moths--population increase
Light moths--hunted easily, light moths--population increase
Lights moths will change their color to match dark moths.
A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:
the green population to increase and the yellow to decrease
both populations should stay the same
both populations will increase
the green population to decrease and the yellow to increaseThis is a wrong answer
the movement of genes into or out of a population
Gene Flow
Random chance; small population
Genetic Drift
A sudden change in one or more characteristics due to a change in a gene
Mutation
Occurs due to physical difference as a result of a genetic difference
Non-Random Mating
The movement of organisms from one place to another
Migration
Which of the following represents migration?
