Show:
Don't let it Bac Vire
Dar you Winning?
Cynical
Cycles
Organisms
What's eating you?
100
Which of the following is found in both cells and viruses?

A. Silica
B. Genetic material
C. Digestive cavity
D. Flagella

What is
B. Genetic material
100
Birds and reptiles are similar in that they are vertebrates and lay eggs. They differ in that reptiles have teeth and birds have beaks. Some birds do possess teeth. However, these teeth are present only in the embryonic stage. Which conclusion is best supported by the presence of teeth in bird embryos?

A. Modern reptiles are the ancestors of modern birds.
B. Birds and reptiles share a common ancestor.
C. Birds and reptiles eat similar types of food
D. Ancestors of reptiles had beaks similar to those of birds.

What is
B. Birds and reptiles share a common ancestor.
100
Energy used by producers in a grassland food web is provided by--

A. sunlight
B. photosynthesis
C. oxygen
D. carbon dioxide

What is
B. photosynthesis
100
An oakworm caterpillar feeds on the leaves of an oak tree. This type of interaction is--

A. mutualistic
B. commensalistic
C. competitive
D. parasitic

What is
D. parasitic
100
Some mesquite trees have deeper roots that any other plant in the desert. How are deep roots an adaptation for survival in the desert?

A. Deep roots can protect the tree from predators
B. Roots encounter cooler condition far below the desert surface
C. Roots can extend great distance to reach water
D. Deep roots interact with beneficial bacteria below the surface

What is
C. Roots can extend great distance to reach water
200
People infected with the human immunodeficiency virus (HIV) have an increased risk of dying from secondary infection. Which of these best explains how HIV increases the danger of secondary infections?

A. HIV produces antigens that damage red blood cells
B. HIV adds genetic material from harmful microbes
C. HIV destroys helper T cells
D. HIV consumes beneficial microbes in the body

What is
C. HIV destroys helper T cells
200
A guppy is a species of small freshwater fish. Scientists observed that the average size of guppies in a pond decreased over a few years after a guppy predator was introduced into the pond. Which of the following best explains the change in guppy size?

A. Speciation
B. Convergent evolution
C. Inbreeding
D. Natural Selection

What is
D. Natural Selection
200
Streptococcus infection in a person's throat can cause pain and fever. Streptococcus can be controlled by antibiotics. Streptococcus is a --

A. virus
B. bacterium
C. protozoan
D. fungus

What is
B. bacterium
200
After being introduced in the 1930s, the fire ant (Solenopsis invicta) became established throughout much of the southern United States. One biological way to control fire ants might be to introduce organisms that are --

A. mutualistic with fire ant queens
B. nurtured by fire ant workers
C. preyed on by fire any drones
D. parasitic to fire an larve

What is
D. parasitic to fire an larve
200
Which of the following characteristics could help short plants survive in areas with limited sunlight

A. Broad leaf surfaces
B. Brightly colored flowers
C. Thick stems
D. Shallow roots

What is
A. Broad leaf surfaces
300
What is the most common threat to a host organism posed by an invading virus?

A. Production of viral fluids int he bloodstream
B. Fermentation of acids in the digestive system
C. Destruction of cells by viral reproduction
D. Stimulation of muscle tone in the heart

What is
C. Destruction of cells by viral reproduction
300
Which of the following is most likely to cause increases in a predator population

A. Fewer Prey
B. A reduction in competition
C. More parasites
D. A period of draught

What is
B. A reduction in competition
300
Cows and other ruminants are herbivorous animals. Their diet includes cellulose, which must be fermented before it can be digested. Which of these aid in the fermentation of cellulose in a cow's digestive system?

A. Bacteria
B. Fungi
C. Algae
D. Viruses

What is
A. Bacteria
300
A humming bird feeds on the nectar of a flowering plant. In this process the bird gains nutrition while spreading the plant's pollen to other flowers. The relationship between hummingbirds and flowering plants can be described as --

A. commensal
B. predatory
C. parasitic
D. mutualistic

What is
D. mutualistic
300
Cacti grow slowly compared to most other plants. The fact that cacti keep their stomata closed for much of the day can help explain this growth characteristic. Which of these best explains the advantage of keeping stomata closed during the day?

A. It limits water loss through transpiration
B. It conserves oxygen produced in photosynthesis
C. It recycles carbon dioxide within plant systems
D. It protects plant tissue from predators

What is
A. It limits water loss through transpiration
400
Some antibiotics cause patients to exhibit digestive side effects. These side effects are most often the result of --

A. bacteria being killed in the digestive tract
B. the antibiotics being converted into stomach acid
C. too much water being drawn into the digestive tract
D. the stomach wall being torn

What is
A. bacteria being killed in the digestive tract
400
A man treated his home with a pesticide that kills roaches. The first application of the pesticide killed 92% of the roaches. Two months later he applied the pesticide to his home again, but the second application killed only 65% of the roaches. What would best explain the decrease int he effectiveness of the pesticide?

A. The pesticide is effective only against mature roaches
B. Once roaches learned how to fist the pesticide, they taught others.
C. The surviving roaches were naturally resistant to the pesticide, and that resistance was inherited by their offspring.
D. The pesticide cause some of the roaches' digestive system to mutate and metabolize the pesticide.

What is
C. The surviving roaches were naturally resistant to the pesticide, and that resistance was inherited by their offspring.
400

Amino Acid Composition of Cytochrome c in Some Organisms

Amino Acid Organism Q Organism R Organism S Organism T
Alanine 10% 10% 10% 10%
Arginine 4% 4% 4% 4%
Aspartic Acid 6% 6% 6% 6%
Cysteine 6% 6% 6% 4%
Glutamic Acid 12% 12% 8% 8%
Glycine 4% 2% 4% 4%
Valine 2% 1% 4% 6%

The table shows a comparison of some amino acids found in cytochrome c. The two organisms in the table that are most closely related are--

A. Q and T
B. R and S
C. Q and R
D. S and T

What is
D. S and T
400

In Central America, there is a tree call bullhorn acacia (Acacia cornigera) that provides both food and shelter to a certain species of ant (Pseudomyrmex ferruginea). The ants live within the tree without causing ti harm. In fact, the ants protect the tree by vigorously attacking and stinging other animals that try to eat it.


This relationship is an example of--

A. predation
B. parasitism
C. mutualism
D. commensalism

What is
C. mutualism
400
Which of these characteristics might help a plant species survive in an area with limited sunlight?

A. bright flowers
B. large leaves
C. short stems
D. thick cuticles

What is
B. large leaves
500
Many species of bacteria can be found int he human mouth. Which of these explains the great variety of bacteria in the mouth?

A. Large volumes of air cause bacteria to change form
B. Salivary glands cause mutation in bacterial populations
C. The presence of nutrients makes the mouth a favorable habitat
D. Calcium in the teeth provides a suitable pH environment

What is
C. The presence of nutrients makes the mouth a favorable habitat
500

  • A gray whale develops in its mother's uterus for about a year

  • The whale calf has hair on its face when it is born.

  • As the calf grows, the hair is lost, and barnacles attache themselves to its skin.


Which statement is best supported by the information above?

A. Barnacles develop within the whale uterus
B. Whales descended from ancestors with hair
C. Fluid inside the uterus is colder than seawater
D. Adult whales will possess more hair in the future

What is
B. Whales descended from ancestors with hair
500
Characteristics of some lizards

  • Live mainly in hot, dry climates

  • Release very little water

  • Excrete waste in the form of solid uric acid, which contains very little water


Which of the following is best supported by the information shown above?

A. These lizards evolved in arid habitats
B. Modern lizards drink more water than their ancestors did
C. These lixards cool themselves by evaporation
D. Modern lizards excrete more water than their ancestors did

What is
A. These lizards evolved in arid habitats
500
About 10% of the energy at one trophic level is passed to the next level. What usually happens to the energy that is not passed to the next trophic level or used to carry out life processes?

A. It is given off as heat
B. It is stored as vitamins
C. It is used in reproduction
D. It is used in protein synthesis

What is
A. It is given off as heat
500
Which of the following is an adaptation most likely observed in plants growing along a bay?

A. Resistance to predation
B. Extension of root length
C. Tolerance of saltwater
D. Sensitivity to green light

What is
C. Tolerance of saltwater