WorksheetsSemester 1 Exam Review
Total questions: 40
Worksheet time: 22mins
Name
Class
Date
1.
Which of the following statements could account for the change in population seen between years 7 and 8?
a)
The birth rate of pigeons increased
b)
The emigration rate of the pigeons decreased
c)
The death rate of the pigeons exceeded the birth rate
d)
The neighborhood reached its carrying capacity for the pigeon population
2.
The graph shows changes in population of deer over time. Which conclusion is supported by the data?
a)
An invasive species lives in this ecosystem
b)
Shrimp have a symbiotic relationship with another organism
c)
The food source for this population changes seasonally
d)
This population of organisms live in a stable environment
3.
The graph shows the changes in the sizes of four animal populations over a 16-year period. In which population was the birthrate most likely greater than the death rate from year 8 to year 12?
a)
Population 1
b)
Population 2
c)
Population 3
d)
Population 4
4.
The pea weevil is a type of insect. The table above shows the average time it takes pea weevil eggs to hatch at different temperatures. Based on the data, which of the following conditions would promote the highest population growth rate in pea weevils?
a)
Cold springs with temperatures from 11 degrees C to 16 degrees C
b)
Moderate summers with temperatures from 25 degrees C to 27 degrees C
c)
Heat waves in which the temperature is sustained well above 28 degrees C
d)
Overnight frosts after which the temperature warms from 0 degrees C to 11 degrees C
5.
During which time period did mule deer population most likely experience the greatest decrease of environmental resources?
a)
1930-1950
b)
1956-1960
c)
1960-1970
d)
1976-1980
6.
What gas is being formed inside the test tube?
a)
Carbon dioxide
b)
Oxygen
c)
Nitrogen
d)
Hydrogen
7.
In which beaker are the leaf disks most likely to perform photosynthesis?
a)
Beaker 1
b)
Beaker 2
c)
Beaker 3
d)
None of them
8.
Photosynthesis is a chemical reaction that converts
a)
Light energy in chemical energy
b)
Heat energy into mechanical energy
c)
Light energy into electrical energy
d)
Heat energy into electrical energy
9.
Through cell respiration, plants get energy from glucose. The energy stored in glucose originally came from
a)
Plants
b)
Animals
c)
The sun
d)
Geothermal sources
10.
In this organic molecule, which element is identified by each X?
a)
Iron
b)
Carbon
c)
Sodium
d)
Phosphorus
11.
Which molecules in the table are made of Carbon, Hydrogen, and Oxygen only?
a)
1 and 2
b)
2 and 3
c)
1 and 3
d)
3 and 4
12.
Carbohydrates are macromolecules used for energy in living organisms. Large carbohydrate molecules are made of smaller building blocks called monosaccharides. The arrangement of which three components is used to distinguish one monosaccharide from others?
a)
Carbon, hydrogen, and oxygen
b)
Glucose, fructose, and ribose
c)
Peptide, fatty acid, and purine
d)
Water, carbon dioxide, and nitrogen
13.
How many joules of energy would be in the tertiary consumer level if the total energy in the producer level was 100,000 J?
a)
10,000 J
b)
100 J
c)
1,000 J
d)
1 J
14.
The deserts of Nevada are home to a wide range of different animals. Joshua trees make up a large percent of the plant life in Nevada’s low deserts. Wild deer that live in these low deserts rely on the Joshua trees as their main source of food. Each deer needs a total of 600 Kcals of energy in order to survive the colder months of the year. If a wild fire destroyed a large section of the Joshua trees and only left a total of 100,000 Kcals of energy, what would happen to the population of 400 wild deer?
a)
The population would stay the same because they would find a new source of food.
b)
The population would increase because they would have fewer resources to fight over.
c)
The population would stay the same because they are not affected by the fire.
d)
The population would decrease because they would not have enough resources to survive.
15.
Plants undergo both photosynthesis and cellular respiration. Which statement correctly compares photosynthesis and respiration?
a)
Photosynthesis releases stored energy, while cellular respiration stores energy.
b)
Photosynthesis stores energy, while respiration releases stored energy.
c)
Neither photosynthesis nor cellular respiration require water.
d)
Both photosynthesis and cellular respiration require sunlight.
16.
The overall equation for cellular respiration of glucose is…
a)
6CO2 + 6H2O = C6H12O6 + 6O2 + ATP + Heat
b)
C6H12O6 + 6O2 = 6CO2 + 6H2O + ATP + Heat
c)
C6H12O6 = water + ATP + Heat
d)
C6H12O6 = 6CO2 + 6H2O + ATP + Heat
17.
According to the graph below, why would the beetle produce more CO2 with sucrose rather than with water alone?
a)
The presence of water alone increases the amount of CO2 given off.
b)
The presence of sucrose provides a source for the carbon in CO2.
c)
The presence of water alone is not energized enough to produce CO2.
d)
The presence of sucrose limits the amount of carbon available to become CO2.
18.
When the Mount St. Helens volcano erupted, the blast covered much of the surrounding area with ash. Based on the diagram below, which list shows the sequence of secondary succession that followed the eruption?
a)
X, Y, Z, W
b)
Z, X, Y, W
c)
W, Y, X, Z
d)
Z, Y, W, X
19.
During World War II, the United States used a pesticide called DDT to protect the country’s crops. Over time, the consequences started to appear in the populations of certain animals. Bald eagles suffered because DDT causes the shell of their eggs to become extremely thin. What is the best solution to revive the falcon population after the use of DDT?
a)
Hatching and raising several eagles before releasing them.
b)
Building better nests for the eagles to use.
c)
Letting the eagles’ population continue to decline.
d)
Breeding eagles with another type of bird.
20.
The Pesticide DDT was used to kill mosquitoes for many years. DDT entered bodies of water, moved up the food chain, and built up in the tissues of fish. When female bald eagles ate these fish, they produced eggs with very thin shells. The eggs broke when the eagles sat on their nests. The U.S. government banned the use of DDT in 1972. Which of the following graphs most likely shows how the ban of DDT affected the bald eagle population?
a)
A
b)
B
c)
C
d)
D
21.
The diagram below represents the distribution of trees in an area of a forest. When squirrels move into the area, they gather acorns from the one oak tree in this area and hide them in the ground over a wide area.Which of the following best represents the same area of the forest 20 years later?
a)
A
b)
B
c)
C
d)
D
22.
Looking at the graph, what might have changed in Burkina Faso between the two different time periods to the population’s safe water?
a)
Volunteers came in and built wells to increase the safe water.
b)
The people in the country cleaned up the rivers and waterways.
c)
The country’s water sources were overrun with trash.
d)
Safe water was transported to the country.
23.
Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?
a)
Rabbits have a high death rate
b)
There are few effective predators
c)
Additional rabbit species have been introduced
d)
There is an increase in rabbit competitors
24.
In the longstanding war between coyotes and sheep ranchers in New Mexico, studies show that coyotes kill sheep and the percentage of sheep lost from herds in area where coyotes have been exterminated is about the same percentage lost in areas where coyotes are still present. What is the most likely explanation for the similarity in the percentage of sheep lost in both areas?
a)
Coyotes were protecting sheep
b)
The sheep died from overcrowding
c)
Another predator was killing sheep
d)
Coyotes were preying on sick or weak sheep
25.
A wetland was drained to build a mall. Two years later, there were no more toads in that area. Why did the toads disappear?
a)
The toads were destroyed by the construction equipment
b)
The toads died because the toads cannot breath out of the water
c)
The toads were frightened and went into the woods
d)
The toads got their food from the wetland ecosystem
26.
Which of the following human activities reduces biodiversity?
a)
Prohibiting hunting in wildlife preserves
b)
Taking tissue samples from members of endangered species
c)
Planting only native grass species to prevent erosion beside highway
d)
Planting only red pine trees to replace native hardwood forest cut for lumber
27.
In the 1990s, the harvesting of horseshoe crabs for fishing bait and biomedical use led to a significant decrease in the size of horseshoe crab populations on the Mid-Atlantic coast of the United States. Recovery efforts for the horseshoe crab populations are most challenged by which of the following?
a)
Horseshoe crabs are most active at night
b)
Horseshoes crabs have to shed their exoskeleton as they grow
c)
Horseshoe crabs can live on the Atlantic coast from Maine to Mexico
d)
Horseshoe crabs take nine to twelve years to reach maturity and reproduce
28.
A new species of snake was introduced to a tropical region. Scientists then notice a steady decline in the presences of field mice and an increase in the number of snakes. Which of these in the most likely explanation about why the population size of each animal changed?
a)
Then snakes introduced to the region dominated the habitat, forcing the mice to find another place to live
b)
The mice became prey to the introduced snakes, allowing the snake population to increase but decreasing the mice population
c)
The snakes introduced to the region competed with the mice for food, allowing the snake population to increase but decreasing the mice population
d)
The people in the surrounding area set traps the killed the mice, allowing the snakes to live without any predators and therefore to increase in number
29.
Current evidence suggests that a population of sea otter in Alaska has significantly declined in recent years. The habitat of these sea otters is also used by humans for oil and gas development, fishing, and transportation. Which action would best allow scientists to help prevent the loss of sea otters while still considering the diverse interests of human in the area?
a)
Collecting data on how many sea otter are born each year
b)
Collecting data on many possible causes of the decline sea otters
c)
Comparing the numbers of sea otters observed today and 100 years ago
d)
Comparing the number od sea otters observed in the morning in and the afternoon
30.
Highways allow people to travel between towns and cities. These highways also divide ecosystems into smaller pieces. Animals can become separated from lakes they use for breeding. For example, tiger salamanders travel long distances to breed at lakes. How could highway systems affect animals such as the tiger salamander?
a)
Tiger salamander habitats may be exposed to less pollution.
b)
Tiger salamanders may be cut off from important resources.
c)
Tiger salamanders could improve their ability to remember roads.
d)
Tiger salamander habitats within ecosystems could become larger.
31.
There is concern about the effect that overfishing is having on the population of tuna, swordfish, and other large fish in the ocean. An organization has come up with the following four suggestions on how to manage the fish population. Which suggestion would conserve the fish in the ocean?
a)
Creating fish farms would increase the number of fish worldwide.
b)
Controlling fishing would help increase the existing fish population.
c)
Introducing new fish would increase that particular fish population.
d)
Increasing the amount of food would encourage fish migration.
32.
In the biosphere, which group of organisms replenishes a large portion of the atmospheric oxygen supply?
a)
Mammals
b)
Fungi
c)
Insects
d)
Plants
33.
The illustration below shows part of the carbon cycle. At position Y, carbon is most likely to be in which of the following forms?
a)
Protein
b)
Carbon solid
c)
Carbohydrate
d)
Carbon dioxide
34.
How do nitrogen-fixing bacteria help cycle nitrogen through ecosystems?
a)
They release nitrogen into the atmosphere when they replicate their DNA.
b)
They convert sunlight into chemical energy which is then stored in the nitrogen.
c)
They convert ammonia from animal feces and urine into forms plants can use.
d)
They capture nitrogen from the atmosphere and convert it into forms that plants can use.
35.
The diagram below shows part of the carbon cycle. If many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest?
a)
Increase use of atmospheric CO2
b)
Decreased use of atmospheric CO2
c)
Decreased combustion of fossil fuels
d)
Increased combustion of fossil fuels
36.
The diagram below shows part of the carbon cycle. Use the diagram to answer the following question. Which of these would lead to an increase in carbon dioxide in the atmosphere?
a)
A decrease in respiration
b)
A decrease in the ozone layer
c)
An increase in photosynthesis
d)
An increase in the burning of fossil fuels
37.
Land animals need nitrogen to survive, but they cannot use the nitrogen gas found in the air they breathe. How do organisms take in the nitrogen they need to survive?
a)
By exercising
b)
By eating food
c)
By drinking water
d)
By swimming in water
38.
As respiration begins, glucose is broken down into pyruvic acid and two molecules of ATP are formed. What will happen next in yeast cells if no oxygen is available?
a)
Krebs cycle
b)
Photosynthesis
c)
Alcoholic fermentation
d)
Lactic acid fermentation
39.
Which statement best distinguishes aerobic and anaerobic respiration?
a)
Only aerobic respiration involves fermentation.
b)
Only anaerobic respiration occurs in the mitochondria.
c)
Only aerobic respiration requires oxygen.
d)
Only anaerobic respiration produces carbon dioxide.
40.
Which most accurately describes the difference in ATP production between aerobic respiration and anaerobic respiration?
a)
Aerobic respiration produces more ATP than anaerobic respiration.
b)
Anaerobic respiration produces more ATP than aerobic respiration.
c)
Only anaerobic respiration produces measurable amounts of ATP.
d)
Anaerobic and aerobic respiration produce the same amount of ATP.
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