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WorksheetsAQA Bio A-Level Module 4B
Total questions: 60
Worksheet time: 30mins
CROSSING OVER INCREASES
LIFE SPAN
GENETIC VARIATION
THE NUMBER OF OFF-SPRING
ALL ARE TRUE
What are the building blocks of proteins called?
DNA
RNA
Ribosomes
Amino Acids
Which organelle is DNA usually found in?
cell membrane
vacuole
chloroplast
nucleus
What do gene mutations change?
DNA
RNA
Proteins
Lipids
What is the building block of DNA
Monosaccharide
Amino Acid
Fatty Acid
Nucleotide
ATG CCA AAT
ATG CCA AAT
Mutations can benefit humans because they can:
Cause illness
Make an organism more suited to live in its environment.
Make organisms live shorter lives
Cause organisms to grow extra limbs.
A mutation is defined as:
A change in the cell's structure
Anything that changes in an embryo
Any change in the physical features of a human
A change in the DNA sequence
A mutation can occur if a base pair is ____________, deleted, or substituted for another.
modified
added
transferred
Mutations are random.
True
False
Mutations are SOMETIMES helpful to the organism.
true
false
True or false, mutations create genetic diversity?
True
False
In order for offspring to get a genetic mutation, the mutation must occur in what type of cell?
Cells with no nucleus.
Any body cell after birth.
Cells with no cell wall or cell membrane.
Cells like eggs or sperm cells that are undergoing reproduction.
Which of the following is a situation that could cause evolutionary change that is NOT due to natural selection?
A volcano erupts and kills many individuals in a population.
A mutation produces sea stars that are less visible to predators.
An insecticide is sprayed in a community to combat mosquitoes.
Cattle are treated with antibiotics to prevent the spread of infections.
A population of rabbits grows rapidly from one year to the next. Then one year, a disease strikes approximately one fourth of the adult rabbits. The disease remains with the population in the years that follow.
As explained by Darwin’s theory, which of these conditions allows the rabbit population to evolve by natural selection?
The disease affects adult and juvenile rabbits equally.
The disease reduces the ability of the rabbits to reproduce.
Some rabbits are resistant to the disease, and they pass the resistance to their offspring.
No rabbits are resistant to the disease, and all die when the disease strikes them.
A population that is isolated in a remote environment is still able to experience genetic variation. How could genetic variation that contributes to evolution occur in such a population?
A mutation in a liver cell produces liver cancer.
Lateral gene transfer occurs that produces an organism that is less resistant to drought.
A mutation in an egg cell causes a change in DNA that produces an organism that is more sensitive to sunlight.
A mistake in DNA replication before meiosis produces an organism that is better able to outrun predators.
Grass plants in a population range in height from 6 cm to 25 cm. The short plants receive little sunlight, and the tall plants are eaten by grazing animals. Which statement best describes the effect of natural selection on the grasses?
Because average height grass plants are favored, stabilizing natural selection is occurring.
Because average height grass plants are favored, disruptive natural selection is occurring.
Because tall grass plants are favored by the animals that eat grass, directional selection is occurring.
Because short and tall grass plants are favored, normal natural selection is occurring.
Which of the following best illustrates natural selection?
An organism with favorable genetic variations will tend to survive and breed successfully.
A population monopolizes all of the resources in its habitat, forcing other species to migrate.
A community whose members work together utilizing all existing resources and migratory routes.
The largest organisms in a species receive the only breeding opportunities.
Which of the following is NOT part of the that mechanisms of natural selection?
Organisms produce more offspring than can survive.
Disease and natural disaster will limit population growth.
Species today descended with modifications from ancestral species.
Organisms with advantages will survive and reproduce.
Before the invention of the light bulb, Americans burned oil in lamps for light. Whale oil was popular bio-fuel for these lamps.
Ship crews would hunt whales for their oil. They searched for the largest whales they could find so that they could obtain as much whale oil as possible. How mighty decades of whale hunting possibly affect the natural selection of the species?
The whales lost their legs.
The whales became slower.
The whales became smaller.
The whales changed their calls.
Which of the following statements best describes what will most likely occur to the moth populations in the image above?
The light moths will be captured by predators more easily than the dark moths, and the population of dark moths will rise.
The light moths will be captured by predators more easily than the dark moths, and the population of light moths will rise.
The dark moths will be captured by predators more easily than the light moths, and the dark moths will probably go extinct.
The light moths will change their wing color to match that of the dark moths.
Suppose a certain species of insect lives in the lush green canopy of the rain forest. Some of the insects are bright green in color, and some are bright yellow. Assume there is a natural predator of the insect in the area. What do you expect to happen to the populations of the green and the yellow insects over time?
The green insect population will increase and the yellow insect population will decrease.
The green insect population will decrease and the yellow insect population will increase.
Both insect populations will remain constant over time.
Both insect populations will increase over time.
Can mutations be passed down to offspring?
Yes
No
Where are genes located?
on the cell
in the mitochondria
on chromosomes
on an organism
What is a gene?
sections of DNA
sections of UNA
a trait
an adaptive trait
Do genes code for traits?
yes
no
individuals with alleles for an extreme type are more likely to survive and reproduce. This is an example of:
stabilizing selection
directional selection
disruptive selection
genetic drift
the selection pressure favors the extreme phenotypes, dividing the population into 2 distinct groups. This is an example of:
directional selection
stabilizing selection
geographic selection
disruptive selection
Individuals with intermediate traits are more likely to survive and reproduce. This is an example of:
stabilizing selection
directional selection
adaptive radiation
disruptive selection
Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment. This is an example of:
directional selection
disruptive selection
stabilizing selection
sexual selection
artificial selection
Aspen trees that are over 25 m tend to blow over in high winds; aspen that are under 15 m don't get enough sun. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
snails with a forward spiral and snails with a backward spiral have an advantage in their environment. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
On average, human newborns weigh 7.2 pounds. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
Fish that produce 40,000+ eggs have greater fitness than fish that produce less than this number. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
Bacteria that are too large cannot obtain nutrients efficiently and bacteria that are too small cannot compete for those nutrients successfully. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
Producing 1000 cactus spines requires too much energy, but producing <500 leaves the plant open to predation. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
Ground finches born following a severe drought tend to have larger beaks (on average) than the previous generation. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
Light-colored oysters would blend into the rocks in the shallows, and the darkest would blend better into the shadows. The ones in the intermediate range make them easier prey. This is an example of:
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
