Natural Selection
Which of the following is a source of genetic variation?
A. cloning
B. mutation
C. selective breeding
D. natural selection
D. natural selection
Which type of interaction causes harm to one organism?
a. Parasitism c. Cooperation
b. Mutualism d. Commensalism
a. Parasitism
The discovery of which of the following has most directly led to advances in the identification of suspects in criminal investigations?
A. antibiotics
B. cell structure
C. DNA structure
D. sterile procedures
C. DNA structure
Which best describes the role plants serve in the oxygen cycle?
They absorb oxygen during photosynthesis.
They absorb oxygen during decomposition reactions.
They release oxygen as a waste product of photosynthesis.
They release oxygen as a waste product in cellular respiration.
They release oxygen as a waste product of photosynthesis.
Infections spread quickly when bacteria reproduce rapidly. Which best describes how bacterial cells reproduce themselves?
a. A bacterial cell will copy its DNA, and hten split to produce two cells, each receiving one copy of the DNA.
b. A bacterial cell will divide its DNA in half, and then split to produce two cells, each receiving one-half of the DNA.
c. Two different bacterial cells will combine DNA, and then split to produce two cells, each receiving one-half of the DNA.
d. Two different bacterial calls will combine DNA, and then split to produce four cells, each receiving one-fourth of the DNA.
a. A bacterial cell will copy its DNA, and hten split to produce two cells, each receiving one copy of the DNA.
Which of these best illustrates natural selection?
A. an organism with favorable genetic variations will tend to survive and breed successfully
B. a population monopolizes all of the resources in its habitat, forcing other species to migrate
C. A community whose members work together utilizes all existing resources and migratory routes
D. The largest organisms in a species receive the only breeding opportunities
A. an organism with favorable genetic variations will tend to survive and breed successfully
In the Arctic, polar bears hunt seals as a source of food. Describe the relationship between polar bears and seals.
The polar bears are predators; the seals are prey.
By inserting a gene into crop plants, scientists have developed plants that are resistant to insects. If an insect eats the plant, the insect dies. Which practice is unnecessary with this new plant variety?
A. eroding the land by tilling
B. removing weeds from crops
C. spraying plants with pesticides
C. spraying plants with pesticides
Which organisms recycle carbon in decaying matter back into atmospheric carbon dioxide?
a. Fish c. Plants
b. Fungi d. Mammals
Fungi
What is most often used to destroy bacteria?
antibiotics
See slide for picture (Evolution 300)
The similarities in structure of the bones of these animals suggests that
A. size of these bones is the same
B. these species share common ancestors
C. these species developed at the same time and location
D. The chemical make-up of these animals is exactly the same
B. these species share common ancestors
Which animal relationship is parasitic?
a. A bear eating a fish c. A deer grazing in a field
b. A tick feeding on a dog d. A zebra running from a lion
b. A tick feeding on a dog
Which of these is an example of selective breeding?
A. cutting a stem from a plant so that a new plant grows from the stem.
B. Selecting two horses and having them mate in order to produce stronger offspring.
C. taking a skin cell from a sheep and making an exact clone of the sheep.
D. Replacing DNA of a plant with DNA that allows the plant to grow in little water.
B. Selecting two horses and having them mate in order to produce stronger offspring.
In the carbon cycle, carbon dioxide is added to the atmosphere by which process?
a. Cellular respiration c. Photosynthesis
b. Decomposition d. Transpiration
a. Cellular respiration
What is the best way to prevent the spread of a virus?
a. provide antibiotics c. provide antifungals
b. provide vaccinations d. provide vitamins
b. provide vaccinations
See slide (Evolution for 400)
Which of the following statements is supported by the similarities between these embryos?
A. The turtle is more advance than the chicken
B. The chicken has more offspring than the turtle
C. The turtle and the chicken are similar as adults
D. The chicken and the turtle share a common ancestor
D. The chicken and the turtle share a common ancestor
Oxpeckers are a type of bird that feeds on ticks and flies found on zebras. The oxpecker also keeps wounds on animals clean and free from maggots, thereby reducing the chance of infection. What type of relationship exists between oxpeckers and zebras?
Scientists found an organism that can live without water for long periods of time. The scientists made copies of its DNA, then injected this new DNA into corn. Which of these describes the process the scientists used?
A. cloning
B. selective breeding
C. genetic engineering
D. asexual reproduction
C. genetic engineering
From what source does most of the energy in an ecosystem come?
a. Oil c. Water
b. Wind d. Sunlight
d. Sunlight
Athlete's foot is caused by a fungal infection. The fungus infects moist areas and feeds on the skin tissue. How does skin typically become infected?
by excessive washing of feet
by sharing food with an infected person
by sharing a towel with an infected person
by wearing socks made of synthetic fabric
by sharing a towel with an infected person
What do scientists most often use to form the basis for biological classification?
a. Dietary habits c. Geographic location
b. Population size d. Comparative anatomy
d. Comparative anatomy
population
____________ focuses on how living organisms can be modified to improve health, nutrition and agriculture.
biotechnology
In a food web, energy flows from producer to consumers. What else flows from producers to consumers?
a. Soil and rock c. Light and sound
b. Carbon and oxygen d. Chlorophyll and nitrogen
b. Carbon and oxygen
Which is the best method for preventing a parasitic disease?
Vaccination
Wearing a mask
Limiting physical contact with others
Avoiding contaminated food and water.
Avoiding contaminated food and water.