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WorksheetsNatural Selection and Adaptations
Total questions: 20
Worksheet time: 3600secs
The picture below shows a giraffe eating leaves off of a tree. Which of the following characteristics would help individuals in a population of giraffe outlive the other giraffes?
Having the longest necks
Having the brightest fur
Having the most spots
Having the sharpest teeth
Chameleons are reptiles that have the ability to hide from predators and prey by blending in with their environment. They can change the pattern and/or color of their skin.
This ability is known as —
natural selection
imitation
mimicry
camouflage
Most organisms have coloration that helps them blend into their surroundings. Male peacocks have colorful, feathered tails.
These conspicuous tails are used for —
building nests
attracting mates
flying and balance
avoiding predators
Over time, the food supply for birds on an isolated island has changed. The supply of insects, small tender seeds, and vegetation has shrunk. The supply of tough, large, hard seeds has remained unchanged. Over several generations, changes in genetic traits of birds' beaks have occurred. Which beak is most likely to improve the survival rate of the birds?
The Galapagos Islands are home to a variety of finches. Charles Darwin observed the finches on the island and noticed that each species was well suited to the life it led. For example, finches that ate insects had sharp, slender beaks; finches that ate seeds had strong, wide beaks.
According to the above information and image, beak shape in these finches is an example of —
adaptation
simulation
competition
environmentalism
Scientists plan to use selective breeding to produce a new type of wheat for farmers who live in northern areas with short summer seasons.
Which of these traits would be MOST useful for these farmers?
large seed size
long stem length
fast growth rate
shallow root systems
Internal structures of organisms have adaptations that enable organisms to be successful in their environment. Blubber in a penguin is one example of this. What function does the blubber perform for the penguin?
make the penguin look bigger to scare off predators
add bulk to the penguin, enabling it to balance on the ice
protect the penguin from freezing water temperature
allows more friction between the penguin and ice
A physical or behavioral trait an organism is born with that helps it survive is -
A mutation
An adaptation
Genetic variation
Gene flow
True or False. All mutations are harmful.
True
False
Natural selection is when _____ decides who survives and who doesn't
humans
year
nature
animals
A woodpecker has a long, thin, pointed beak. How would this adaptation help it survive?
It can easily pick bugs out of the bark in the trees.
It can swim fast
It can catch other animals
It can easily catch fish
Why did dark-colored rock pocket mice first appeared in a population of light-colored rock pocket mice?
They have a mutation that affects their fur color
They migrated due to climate change in their original environment.
They migrated due to shortage of food supply in their original environment.
