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OPFI Unit 1 Flashcards | StudBud
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OPFI Unit 1
OPFI Unit 1
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Scientific Method and Population Dynamics
Flashcards
33 cards
F
Practice quiz
P
Host live
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Questions
33
Answers
1
Which is NOT a characteristic of life?
Ability to move
Response to the environment
Growth and development
Ability to reproduce
2
Some plants open their flowers in the morning when exposed to sunlight. What characteristic of living things is this?
Acquires energy
Adapts to environment
Displays organization
Responds to stimuli
3
Birth rates can be affected by everything EXCEPT
Availability of mates
Predators
No exceptions. These all affect birth rates
Availability of food
4
What is the best explanation why the wolf population is so low when there is an abundance of moose on Isle Royale?
There must be something other than availability of food affecting the wolf
Wolves don't eat moose
The moose population has no effect on the wolf population
Wolves are unpredictable and so are their population sizes
5
Biodiversity has increase exponentially over geologic time
True
False
6
Which is an example of a density-dependent limiting factor?
Blizzard
Earthquake
Disease
Damming of rivers
7
What can you gain by gathering information in scientific experiments?
Data
Hypotheses
Variables
Inferences
8
This is an example of a density-independent limiting factor
Predation
Unusual weather
Competition
Disease
9
A variable that is deliberately changed during an experiment is
the control variable
data
the independent variable
The dependent variable
10
Why did the moose decline in the mid 1990's?
Most likely due to increasing wolf, but need more information
There is no way to know why
Most likely due to declining wolf, but need more information
Because the wolf declined
11
What is the smallest unit of life?
Organism
Cells
Molecules
Atoms
12
Which level of organization contains all the others?
Cells
Molecules
Organism
Atoms
13
Which is a NOT a way to generate hypotheses?
Use logical inference
Use a feeling about what should occur
Use prior knowledge
Use informed imagination
14
This is the type of interaction where an organisms captures another and feeds on it.
Symbiosis
Predation
Competition
Parasitism
15
Humans are the only thing causing extinctions
True
False
16
Death rates can be affected by everything EXCEPT
Predators
Availability of food
No exceptions. These all are true.
Individual fertility
17
Which two factors INCREASE population size?
Deaths and immigration
Births and immigration
Births and Emmigration
Deaths and Emigration
18
The wolf population in this graph is unstable throughout this time period
False
True
19
Population density is
an area inhabited by a population
The number of individuals in an area
The number of people in each age group
carrying capacity
20
Scientific hypotheses must be proposed in a way that
Doesn't contradict previous hypotheses
Enables them to be tested
Nobody else can repeat your experiment
Enables them to be proved valid
21
The following information is
TRUE
EXCEPT
The ratio has stayed relatively the same throughout the whole time
The ratio has changed dramatically in recent years
For most of the time, the ratio has been 25-150 moose per wolf
There are an overabundance of moose presently on Isle Royale
22
Biology is the study of
the land, water, and air on Earth
living things
The environment
Animals and plants only
23
A controlled experiment ensures that ______________ is isolated and tested.
a conclusion
a mass of information
a single variable
several variables
24
The rate of extinctions for birds, mammals, and amphibians is normal compared to past extinctions.
True
False
25
What is NOT a characteristic of all organisms?
Maintains homeostasis
Capable of rational thought
Made of one or more cells
Grows and develops
26
What is the process where organisms keep their internal conditions balanced?
Evolution
Photosynthesis
Homeostasis
Metabolism
27
Which of these statements is FALSE?
More births than deaths increase population
More deaths than births increase population
More deaths than births decrease population
There is more than one answer
28
Humans impact biodiversity significantly
True
False
29
All of this is true about extinctions on islands EXCEPT
No exceptions...all are true
Islands have smaller populations so have greater impacts
Invasive species have been brought to islands by humans
Islands are isolated from humans
30
What is a group of the same type of organisms living in one place called?
Community
Ecosystem
Biosphere
Population
31
What is the process of change that takes place during the life of an organism?
Adaptation
Growth
Development
Maturation
32
The moose population is relatively stable during this time period.
False
True
33
Why did the wolves have such a significant population decline in 1979?
It wa a direct result of the moose decline
Most likely due to increasing moose, but we need more information
Most likely due to decreasing moose but we need more information
There is no way to know why it dropped
