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Which two species share the least characteristics?
A. raccoons and weasels
B. otters and FelidsOtters & Felids
7
P P
1o 1o 2o
2o
3o 2o
3o
2o
2o
4o
3o 3o2o3o
3o
Which organism(s) can be both a 2nd & 3rd level consumer?Coyote, Hawk, Roadrunner
In the nitrogen cycle, what organisms that live in soil and on roots fix or make usable by plants the greatest amount of nitrogen?
Bacteria fix the most nitrogen.
Are bacteria biotic or abiotic?Biotic (living)
What would happen if decomposers like earthworms or microorganisms were
removed from an ecosystem?
The cycle will be disrupted and slowed
If a bee eats nectar from flowers and pollinates the flowers at the same
time, what type of relationship would it be?
Mutualism, they both get something
good.
How is a tick feeding on a dog considered to be
parasitic?
The tick takes away nutrients from the dog.
Write in the percentage of energy at each level in the
food chain.
100%
BirdGrass Grasshopper Snake
10% 1% .1%
What would happen if the bird population increased?
The grasshoppers would decrease and the grass and
snakes would increase
BirdGrass Grasshopper Snake
What is the role of the bird?
BirdGrass Grasshopper Snake
Producer
1o Consumer
2o Consumer
3o Consumer
Which level provides the most energy?
Grass
Grasshopper
Raccoon
Wolf
Producers
1st Consumer
2nd Consumer
3rd Consumer
100%
If there are 50 kilocalories of energy at the tertiary consumer level in a
habitat, how many kilocalories would be at the producer level?
50 tertiary500 secondary5,000 primary
50,000 producer
How much energy is passed to the next level?
10%
What happens to the other 90%?
Used by the organisms at that level & given off as heat
What is the difference between primary &
secondary succession?
Primary succession begins with pioneer species (lichens) & occurs on
barren, uninhabited land.
Describe the order of how primary succession would
occur.
Barren landLichens & mosses appear
Grasses & small plants appearSmall trees appear
What is the benefit of having a classification system?
Common understanding of how to classify & name
organisms
If an organism has genes that improve their ability to survive & reproduce, then what will most
likely increase?
The frequency of genes in the population
Why does a pesticide used to kill insects lose its effectiveness over
time?
Insects become resistant to the pesticide & the frequency of that
allele increase
Why is overfishing detrimental to the
overgrowth of plant life?
Reduces the number of organisms that feed on the
producers.
If a native species & a non-native species are competitors for
resources, why is the non-native species more likely to survive
than the native species?.
The non-native species doesn’t have any natural
predators in the ecosystem
In a particular ecosystem, a population of red foxes has increased while the coyote
population has decreased. What kind of relationship exists between
the foxes & the coyotes?
The coyotes are predators of the foxes.
Present day whales evolved from ancestors that had four legs. What
would the fossils look like to support this theory?
The oldest fossils had four limbs & the most recent had flipper-like limbs
The carbon cycle includes carbon output to the atmosphere and
carbon reservoirs. These reservoirs help to maintain atmospheric
carbon. What would happen to cause atmospheric carbon to
increase?
Destruction of any of the carbon reservoirs
True or False: Crocodiles have more traits in common with
mammals than they do with birds?False; birds & crocodiles are on the
same evolutionary branch
According to the table, which 2 organisms are more closely
related?
Mouse & baleen whale
Animal Sequence of Bases in Section of Hoxc8
Mouse C A G A A A T G C C A C T T T T A T G G C C C T
Baleen whale C C G A A A T G C C T C T T T T A A G G C G C T
Chicken A A A A A A T G C C G C T T T T A C A G C T C T