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WorksheetsEvolution with HW
Total questions: 30
Worksheet time: 30mins
What do we call structures that no longer perform their original function?
Natural Selection
Analogous Structure
Vestigial Structure
Homologous Structure
Which of the following questions would a scientist most likely ask to determine whether various bird populations belong to one species?
Do the various birds have similar average life spans?
Do the various birds often eat the same types of food?
Do the various birds have a wide range of average body sizes?
Do the various birds often mate and produce fertile offspring together?
The shape of songbird wings affects the efficiency of flight. Birds with more pointed wings fly long distances more efficiently, and birds with more rounded wings fly short distances more efficiently.
Over the last 100 years, large portions of forests have been cut down, forcing many songbirds to travel to other forests to find mates. Which of the following evolutionary changes has most likely occurred in these bird populations as a result?
Bird wings are more pointed than they previously were
Bird wings are more rounded than they previously were
Young birds learn to use their pointed wings later than they previously did
Young birds learn to use their rounded wings earlier than they previously did.
Images of the embryo and adult stages of three different organisms are shown below.
Which of the following is the best conclusion that can be drawn from this evidence?
Having similar embryos indicates that these organisms eat the same types of food.
Having similar embryos indicates that these organisms live in a similar environment.
Having similar embryos indicates that these organisms share a recent common ancestor.
Having similar embryos indicates that a certain protein controls how many legs the adult organisms will have.
Which of the following best explains how antibiotic resistance spreads through some populations of bacteria.
All bacteria exposed to antibiotics respond by developing mutations.
Some bacteria exposed to antibiotics survive and pass their genes on to their offspring.
Exposure to antibiotics causes bacteria to learn simple behaviors that help the cells survive.
Exposure to antibiotics causes an increase in the respiration rate of bacteria
The dusky rattlesnakes that live in the mountains of Mexico have a variety of color patterns, body shapes, and behaviors. A recent study of dusky rattlesnake DNA concluded that there is a lot of genetic diversity within the species.
Which of the following statements describes what most likely caused this great genetic diversity in dusky rattlesnakes?
Stable conditions decreased the population sizes of rattlesnakes.
Climate change caused some rattlesnake species to become extinct.
Rattlesnake populations inhabited various types of niches over time.
Environmental extremes caused rattlesnakes to reproduce more often.
Juniper is a desert plant that produces toxins. Unlike most animals, a type of rodent called Stephen’s woodrat is able to eat juniper plants. The woodrat has special liver enzymes to metabolize juniper toxins.
Which of the following statements best explains why the special liver enzymes became common in the woodrats?
The enzymes allow the woodrats to grow much larger.
The enzymes make the woodrats poisonous to their predators.
The enzymes reduce the genetic diversity and variety of traits of the woodrats.
The enzymes increase the ability of the woodrats to survive and pass on their genes.
The distribution of shell heights in a population of smails changed over time, as shown.
Which of the following best explains what happened to the genetic diversity of this snail population in regard to shell height.
Genetic diversity decreased because of selection pressure.
Genetic diversity increased because of changes in food sources.
Genetic diversity stayed the same because of equal birth and death rates.
Genetic diversity increased easue the introduction of a new behavior.
Process by which unrelated organisms develop similarities due to living in similar environments
family descent
survival of the fittest
convergent evolution
divergent evolution
Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?
p2
2pq
q2
p2 + 2pq
The allele frequency of p=.20 What is the percentage of recessive genotype?
.80
.04
.32
.64
A population of sheep is in Hardy-Weinberg equilibrium. 20% of the sheep have white wool, a dominant trait. What is the frequency of sheep that are heterozygous?
80%
64%
20%
50%
Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment
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
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
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
modern corn plants are the descendants of teosinte, a wild corn plant that has been selectively bred for over 1000 years.
directional selection
stabilizing selection
disruptive selection
artificial selection
sexual selection
The lizard has all these derived characteristics EXCEPT
Jaws
Lungs
Bipedal
According to this cladogram, sharks are MOST closely related to which organism?
Amphibians
Ray-Finned Fish
Primates
On the cladogram, which organism is the closest relative of the human?
Parrot
Shark
Hare
What number is the common ancestor of C and D
1
2
4
