Question 14
Invasive species can pose threats to the ecosystem by altering the food web.
True
False
Question 15
How can you help reduce the spread of invasive species?
Select all correct responses
a
Report invasive species
b
Use out of state or imported firewood on camping trips
c
Release unwanted pets to the woods or local waterways
d
Plant native species
Question 16
a
heterozygous female
b
homozygous dominant
c
heterozygous male
d
normal female
Question 17
Scientists monitoring the world's oceans have been collecting pH data for many years. As the pH of our oceans decreases, or becomes more acidic, less calcium is available to marine organisms for growth and development. Which statement describes the outcome of a continued decrease in oceanic pH?
a
A decrease in pH would lead to an increase in marine biodiversity and a decrease in animal populations.
b
A decrease in pH would lead to an increase in marine biodiversity and animal populations.
c
A decrease in pH would lead to a decrease in both marine biodiversity and animal populations.
d
A decrease in pH would lead to a decrease in marine biodiversity and an increase in animal populations.
Question 18
Which of the following refers to an increase in nutrients in a pond, like an increase in nitrogen from fertilizers, that causes large amounts of algae to grow?
a
hydrolyzation
b
condensation
c
evaporation
d
eutrophication
Question 19
After a long drought, an area experiences a series of heavy storms. Once dry streambeds are now overflowing with water, flooding the surrounding lands. Which argument predicts how the storms will affect populations of nearby plants?
Heavy Rain in Namibia and South Africa
a
The storms will cause populations of desert plants to decrease and wetland plants to increase.
b
The storms will cause only the populations of desert plants to increase.
c
The storms will cause only the populations of wetland plants to disappear.
d
The storms will cause populations of desert plants to increase and wetland plants to increase.
Question 20
How might an oil spill affect organisms in a marine ecosystem?
Study reveals sunlight can help dissolve oil into seawater
a
It may cause overgrowth of marine plants.
b
It may add CFCs and PCBs to Earth's atmosphere.
c
It may trap organisms and decrease sunlight below the water's surface.
d
It may cause an increase in carbon dioxide in the atmosphere.
Question 21
The graph below illustrates the growth curves for two types of bacteria, A and B, as the pH of their surrounding mediums change.
pH of 0-7 = acidic pH pf 7-14 = alkaline/basic pH 7 = neutral
What is true of Bacteria A?
a
Bacteria A grows best in a medium that is slightly acidic.
b
Bacteria A grows best in a medium that is neutral.
c
Bacteria A grows best in a medium that is very basic.
d
Bacteria A grows best in a medium that is slightly basic.
Question 22
a
Earth's magnetic field
b
Sunlight
c
Wind
d
Gravity
Question 23
Which of the following is the best conclusion that can be made from this graph?
a
atmospheric carbon dioxide levels have increased steadily since 1960
b
Hawaii has a lot of carbon dioxide
c
atmospheric carbon dioxide levels have been decreasing since 1960
d
humans have been working hard to decrease carbon dioxide levels
Question 24
Photosynthesis and cellular respiration are the driving forces behind which of the following cycles?
a
carbon cycle
b
nitrogen cycle
c
cell cycle
d
bi cycle
Question 25
For any natural ecosystem, which of the following statements applies to the energy pyramid, the biomass pyramid, and the numbers pyramid?
a
Producers are at the bottom level of all three pyramids.
b
Producers are at the bottom of the energy and biomass pyramids, only.
c
Consumers are at the bottom of the energy pyramid, only.
d
Consumers form the bottom levels, while producers are at the top.
Question 26
Which of the following is NOT true about matter in the biosphere?
a
Water and nutrients pass between organisms and the environment.
b
Biogeochemical cycles transform and reuse molecules.
c
The total amount of matter decreases over time.
d
Matter is recycled in the biosphere.
Question 27
The table shows the direction and function of substances in a chemical reaction that takes place in the chloroplasts of plant cells. The table is missing information at W, X, and Y.
What is substance W?
a
sunlight
b
starch
c
minerals
d
methane
Question 28
Where is an anticodon located?
a
mRNA
b
tRNA
c
rRNA
d
DNA
Question 29
The diagram shows a process that is occurring in the nucleus of a eukaryotic cell.
What would MOST LIKELY happen if the process in the nucleus is interrupted?
a
DNA would not be decoded into an RNA molecule.
b
DNA would not be able to be produced.
c
Amino acids would bind together.
d
Protein synthesis would be increased.
Question 30
The photograph shows a forest that is being cut down for lumber and fuel.
How will deforestation most likely affect the amount of groundwater in this ecosystem?
a
Deforestation will increase the amount of groundwater because less groundwater will be absorbed by organisms that live in trees.
b
Deforestation will increase the amount of groundwater because less surface water will evaporate from the deforested area.
c
Deforestation will decrease the amount of groundwater because more groundwater will be exposed to evaporation.
d
Deforestation will decrease the amount of groundwater because more surface water will run off of the deforested area.
Question 14: True
Question 15: a, d
Question 16: c
Question 17: c
Question 18: d
Question 19: a
Question 20: c
Question 21: a
Question 22: a
Question 23: a
Question 24: a
Question 25: b
Question 26: c
Question 27: a
Question 28: b
Question 29: a
Question 30: d