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Unit 2 Biology Review
Unit 2 Biology Review
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1
What is the environmental impact of genetic control methods?
Potential to greatly improve balance
Supports ecosystem balance
May harm nontarget species
No impact
2
During which stage of secondary succession do fast-growing grasses and weeds start to cover the ground?
Climax Community
Regrowth
Pioneer Species
Intermediate Community
3
What are chemical solutions used for?
To kill mollusks like mussels
To spread traits rapidly through a population
To control pests
To stabilize ships
4
What is a disadvantage of habitat management?
Acts fast
May affect nontarget species
Requires ongoing maintenance; may harm or displace nontarget species
Can harm nontarget organisms and the environment
5
What is the significance of understanding ecosystem resilience?
To reduce biodiversity
To focus on human development
To ignore ecological changes
To maintain ecosystem balance
6
What is the effect of overfishing on marine biodiversity?
It has no significant impact
It leads to a decrease in fish populations and affects the marine food web
It improves the health of coral reefs
It increases the number of fish species
7
What is reasoning?
An explanation of how evidence supports a claim
A process of changing states
The ability of an ecosystem to recover
A change in weather patterns
8
What is an example of a major event that can affect coral reefs?
Earthquake
Volcanic eruption
Coral bleaching
Tornado
9
What is an example of a modest physical change that can affect an ecosystem?
An oil spill
A volcanic eruption
Seasonal flooding
An earthquake
10
Which method is considered safe for humans with minimal impact?
Genetic Control
Fishing
All of the above
Chemical Solutions
11
What does the bar graph in the image represent?
Wolf population in Yellowstone from 1975 to 1995
Wolf population in Yellowstone from 2005 to 2025
Wolf population in Yellowstone from 1985 to 2005
Wolf population in Yellowstone from 1995 to 2015
12
When justifying a proposed solution to an environmental problem, what is important to provide to support your arguments?
Stories
Guesses
Opinions
Evidence
13
What is a disadvantage of using chemical solutions for invasive species control?
High cost
Limited effectiveness
Time-consuming
Potential environmental harm
14
What can gradual changes, such as climate warming, do to habitats?
Cause immediate extinction
Have no effect
Increase biodiversity
Slowly alter habitats
15
After a volcanic eruption devastates a coastal ecosystem, what is most likely to happen next?
The ecosystem will slowly regenerate to its former state.
The ecosystem will change into a new type with different organisms.
The ecosystem will immediately regain its full diversity of life.
The ecosystem will recover with its original plants and animals.
16
What can sudden events do to food chains?
Have no effect
Disrupt them
Improve them
Strengthen them
17
Which species recolonize the area first during secondary succession?
Fast-growing species
Birds
Large predators
Mammals
18
What is the impact of Asian kelp on native marine species?
It increases biodiversity
It provides shelter
It competes for resources
It cleans the water
19
What is the primary function of keystone species in an ecosystem?
To dominate all other species
To eliminate competition
To reduce biodiversity
To influence the populations and health of other species
20
What is the dependent variable represented in this coral bleaching graph?
Ocean Depth
Years
Amount of Coral Bleaching (%)
Temperature
21
What is the effect of an oil spill as shown in the image?
Gradual recovery of water
Increase in marine life
Immediate pollution of water
Decrease in water temperature
22
What supports a claim?
Sediment accretion
Fluctuation
Transition
Evidence
23
What is an advantage of habitat management?
Can harm nontarget organisms
Sustainable; can be specific to invasive species
May affect nontarget species
Effective; acts fast
24
What is the process called when grasses and shrubs grow first after a forest fire?
Migration
Mutation
Evolution
Succession
25
What is the definition of risk?
The scientific process of estimating the threat that particular hazards pos
The possibility of suffering harm or loss
The possibility of fear or danger
The possibility of suffering harm
26
What is one way invasive species can impact humans?
By disrupting ecosystems
By providing new food sources
By improving air quality
By increasing tourism
27
What happens if a disease wipes out one plant species in a diverse ecosystem?
All plant species die
The ecosystem collapses
Other species fill its role
The ecosystem becomes less diverse
28
What is the purpose of gene drive technology in controlling invasive species?
To promote genetic variation
To increase reproduction rates
To enhance species adaptation
To ensure infertility genes are passed on
29
What is biological control?
Removing food sources
Using pesticides or herbicides
Using natural predators or diseases
Changing water levels
30
A species whose introduction causes harm to the environment, the economy, or to human health. The new species begins to
Invasive
Endangered
Keystone
Native
31
What is the consequence of lionfish reducing native fish populations?
B) Harm to commercial fisheries
C) Increase in native fish diversity
A) Enhanced coral reef health
D) Improvement in water quality
32
What resources are required for implementing kudzu control?
Only funding for herbicides
Only monitoring equipment
Only solarization materials
Funding for gene drive research and trained workers
33
What type of changes can have immediate and severe effects on ecosystems?
Sudden changes
Predictable changes
Gradual changes
Seasonal changes
34
What can seasonal floods provide to the soil?
Habitat destruction
Invasive species
Essential nutrients
Pollution
35
While genetic engineering has positive benefits, there are also concerns associated with widespread use of genetic engin
an increase in the use of pesticides
a decrease in the genetic diversity of crops
a decrease in crop productivity
an increase in the contamination of water supplies
36
Which of the following is an example of a new ecosystem forming due to changing environmental conditions?
A forest regrowing after a wildfire
Bacteria becoming resistant to antibiotics
Birds migrating to a new area due to climate change
Ocean levels rising due to melting ice
37
What is 'social impact'?
The cost of implementing a solution
The reliability of a solution
The appearance of the environment
The effect of something on people's lives and communities
38
What is a direct interaction of invasive species with ecosystems?
They improve soil quality
They reduce pollution
They outcompete native species
They increase biodiversity
39
Which type of control involves applying herbicides to manage water hyacinth in lakes?
Gene Drive Technology
Biological Control
Habitat Management
Chemical Solutions
40
What do stable conditions in an ecosystem prevent?
Climate change
Habitat destruction
Overpopulation and resource depletion
Natural disasters
41
Where does secondary succession occur?
In urban areas
In lifeless areas
In areas where an ecosystem is disturbed but not destroyed
In deserts
42
What is the role of RNA in the CRISPR system?
To find the exact DNA sequence to edit
To replicate DNA
To synthesize proteins
To transport enzymes
43
What is the main difference between primary and secondary succession?
Primary succession occurs in disturbed areas, secondary in lifeless areas
Both occur in disturbed areas
Both occur in lifeless areas
Primary succession occurs in lifeless areas, secondary in disturbed areas
44
One ecological impact of invasive species is the disruption of local ______.
Agriculture
Fisheries
Fisheries
Food webs
45
What is the chance of passing a gene to offspring in normal inheritance?
75 percent
100 percent
25 percent
50 percent
46
What is a keystone species?
A species that only lives in deserts
A species that plays a critical role in maintaining the structure of an eco
A species that has no impact on its environment
A species that is not affected by habitat loss
47
What social impact can invasive species have?
Reduce water pollution
Change landscapes
Improve air quality
Increase biodiversity
48
What forces species to adapt, migrate, or face extinction?
Stable environments
Gradual changes
No changes
Sudden changes
