Which ecosystem service do decomposers provide?
a
nutrient cycling
b
food production
c
soil creation
d
water cycling
a. Nutrient cycling
The Northern Pacific seastar is a particularly successful invasive species. Which of the following explains why it is so successful in the waters of southeastern Australia, outside of its native environment?
The Northern Pacific seastar is successful in southeastern Australia outside of its native environment because there are no natural predators, parasites or competitors to keep its population in check.
The Northern Pacific seastar is a particularly successful invasive species. Which of the following explains why it is so successful in the waters of southeastern Australia, outside of its native environment?
a
It can cling to the bottom of ships and other vessels.
b
It consumes the eggs of the spotted handfish.
c
It breeds rapidly and has no predators in this environment.
d
It is accustomed to a cold climate.
c. It breeds rapidly and has no predators in this environment.
What aspect of an organism makes it an invasive species?
a
It is from a different ecosystem.
b
It does harm and is introduced to the ecosystem.
c
It is harmful to organisms in all ecosystems.
d
It has no predators in the new ecosystem.
b. It does harm and is introduced to the ecosystem.
In an ecosystem with low biodiversity, the removal of a species will
a
not affect the ecosystem because another species will take its place.
b
disturb the ecosystem because another species will not be able to replace it.
c
not affect the ecosystem because another species will not be able to replace it.
d
disturb the ecosystem because another species will take its place.
b. Disturb the ecosystem because another species will not be able to replace it.
What is the definition of ecological resistance?
a
an ecosystem’s ability to endure in changing conditions
b
an ecosystem’s ability to manage population density
c
an ecosystem’s ability to improve after a setback
d
an ecosystem’s ability to replace species that are wiped out
a. An ecosystem’s ability to endure in changing conditions.
The most biodiverse ecosystem in the world is likely a
a
coral reef
b
tundra
c
cold desert
d
taiga
a. Coral reef.
“Green” material has high amounts of
a
nitrogen
b
magnesium
c
carbon
d
phosphorus
a. Nitrogen.
Which statement is true?
a
Insects can delay the decomposition process.
b
Composting speeds up the decomposition of organic material.
c
Organic material will not decompose without the help of composting.
d
Decomposition only involves microorganisms like bacteria.
b. Composting speeds up the decomposition of organic material.
Biodiversity is measured by
a
examining the usefulness of a specific trait in a species that interacts within an ecosystem.
b
counting the total number of one species population and how they interact within an ecosystem.
c
counting the number and variation of different species of plants, animals, and other organisms that interact within an ecosystem.
d
only analyzing animal species that interact within an ecosystem.
c. Counting the number and variation of different species of plants, animals, and other organisms that interact within an ecosystem.
Marine biologist Dr. James Estes researched sea otters and their habitats in the Aleutian Islands of the North Pacific Ocean.
Sea otters feed on animals such as crabs and urchins. Islands with sea otters contained a lot of kelp, a seaweed that is an important food source for fish and other sea animals. However, Islands without otters had large populations of urchins but no kelp since sea urchins feed on this seaweed. Since sea otters are able to control the population of urchins, this allows for kelp to freely grow in those areas.
Given this information, what term best describes the otter in the Aleutian Islands ecosystem?
a
apex predator
b
producer
c
keystone species
d
decomposer
c. Keystone species.
Imagine that an ecosystem contains rabbits, foxes, wolves, and deer. The following predator-prey relationships exist:
Rabbits are eaten by foxes and wolves
Deer are eaten by wolves
Foxes are eaten by wolves
Select the animal whose absence would have the greatest negative effect on the ecosystem.
a
rabbit
b
deer
c
fox
d
wolf
d. Wolf.
Why are invasive species such a huge threat to ecosystems?
a
Invasive species can do intense damage, so much so that ecosystems may not be able to recover.
b
Invasive species provide no added benefit or diversity to the ecosystem.
c
Invasive species are impossible to control once they are introduced and spread rapidly.
d
Invasive species can replace native species, forcing their migration out of the area.
a. Invasive species can do intense damage, so much so that ecosystems may not be able to recover.
What happens after coral is bleached?
a
The coral produces peroxides.
b
The coral is susceptible to starvation.
c
The coral releases algae onto a sand dune.
d
The coral dies immediately.
b. The coral is susceptible to starvation.
Direct ecosystem services include benefits such as
a
photosynthesis.
b
transportation.
c
soil decomposition.
d
recreational parks.
d. Recreational parks.
Aside from killing native species, what other negative issue might an invasive species present?
a
They might introduce other organisms, like viruses and bacteria.
b
They might avoid interacting with other organisms.
c
They might increase the diversity of native species.
d
They might provide economic benefits.
a. They might introduce other organisms, like viruses and bacteria.
Which option would be the best way to reuse food waste?
a
compost scraps for fertilizer
b
feed scraps to livestock
c
incinerate scraps to make space
d
convert scraps to biofuel
a. Compost scraps for fertilizer.
Environmental changes like increased temperature can stress an ecosystem. Why is this an issue with regard to invasive species?
a
Ecosystems are destroyed by environmental changes, and then invasive species establish a new ecosystem, so the original organisms can never reintegrate.
b
Invasive species are easier to introduce to a stressed ecosystem.
c
Invasive species thrive in stressed ecosystems like those with warmer temperatures.
d
Ecosystems are unable to recover as quickly from damage due to invasive species and environmental changes.
c. Invasive species thrive in stressed ecosystems like those with warmer temperatures.
How do traditional food production practices contribute to a reduction in biodiversity?
a
Air, land, and water are used to produce food, so food that is thrown away is a waste of those original resources.
b
Livestock raised for meat are not as diverse as wild species.
c
Land that is converted to agriculture is no longer a suitable habitat for native species.
d
Agricultural crops are not a good source of food for wild or native species.
c. Land that is converted to agriculture is no longer a suitable habitat for native species.
Which is most likely a keystone species?
a
wolves in Yellowstone National Park, which eat elk, who graze on willows, on which beavers depend to build their dams
b
feral cats, which hunt a wide variety of animals, including birds, lizards, rodents, and insects
c
deer, which eat a variety of plants, including shrubs and young trees, and are consumed by large predators like mountain lions, wolves, and bears
d
cane toads in Australia, which were introduced to eat cane beetles, but eat anything and survive in various habitats
a. Wolves in Yellowstone National Park, which eat elk, who graze on willows, on which beavers depend to build their dams.
The Kudzu vine was brought to the United States from Japan. Which of the following additional characteristics of the Kudzu vine determined that it was an invasive species?
a
it has no economic benefit
b
it was believed to be a "miracle plant"
c
it protects vulnerable grounds against wind erosion
d
it grows rapidly, robbing other plants of sunlight
d. It grows rapidly, robbing other plants of sunlight.
ty you got me an 85
I'm sorry, I don't understand. Could you please give me more context or information about what you are referring to?
thanks
You're welcome! If you have any more questions or need any more assistance, feel free to ask!
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Have a great day!
Question 1 (1 point)
Which evidence supports the theory that fish and mammals evolved from the same ancestor?
a
Their embryos share features in the early stages of development.
b
They both produce egg and sperm cells that must join in fertilization.
c
Their embryos share features in the late stages of development.
d
They both emerge from fertilized eggs
Question 2 (1 point)
A common ancestor is an organism that is the
a
direct ancestor of two or more different organisms.
b
direct ancestor of one organism.
c
indirect ancestor of two or more different organisms.
d
indirect ancestor of one organism.
Question 3 (1 point)
Which group includes only bipedal animals?
a
primates
b
hominins
c
lesser apes
d
hominids
Question 4 (1 point)
Which pattern is evidence that reptiles and amphibians share the same ancestor?
a
They have backbones.
b
They have eyes.
c
They have similar skin.
d
They have legs.
Question 5 (1 point)
Which pair of living organisms are likely to have evolved from the same ancestor?
a
fish and fungi
b
fish and birds
c
birds and amoebae
d
fungi and amoebae
Question 6 (1 point)
What do scientists think about the common ancestor of whales and hippos?
a
The animal lived in water.
b
The animal had two limbs.
c
The animal is still alive today.
d
The animal lived millions of years ago.
Question 7 (1 point)
Scientists discover fossilized bones from two different animals. The Scientists consult the fossil record to learn more about the fossils. Which question will the fossil record best answer?
a
What killed the animals?
b
How are the animals related to modern animals?
c
Which animal was better equipped to survive?
d
Which animal is older?
Question 8 (1 point)
Pythons have small leg bones buried in their tail muscles. What can scientists conclude from this observation?
a
Future generations of pythons will have legs.
b
The leg bones help pythons move.
c
Pythons descended from an animal with legs.
d
The leg bones will not be passed down to future generations.
Question 9 (1 point)
You and your friend inspect a group of fossils from different organisms with various features. Your friend is convinced that all of the fossils are unrelated, but you find evidence that these organisms share an ancestor. What is an example of evidence that you could use to best support this argument?
a
heights
b
patterns in limb structures
c
tooth features
d
number of bones
Question 10 (1 point)
Why do organisms evolve?
a
Organisms naturally select traits that help them survive and reproduce.
b
Changes in the environment cause organisms to change.
c
Organisms with traits that help them survive and reproduce in their environment pass on those traits.
d
Organisms make changes to help them survive and reproduce in their environment.
Question 11 (1 point)
There are 13 species of Darwin’s finches on the Galapagos Islands. They have many similar features but differ in beak size and shape. Which explanation accounts for these characteristics?
a
Finch species have similar diets.
b
All finch species evolved from a common ancestor.
c
Finch species interbreed.
d
Each finch species evolved from a different ancestor.
Question 12 (1 point)
Humans, mice, and giraffes have seven vertebrae in their necks. What can scientists conclude from this observation?
a
All vertebrates have seven vertebrae in their necks
b
Each animal independently evolved this trait.
c
These animals descended from a common ancestor.
d
Humans, mice, and giraffes have the same number of bones.
Question 13 (1 point)
Some horse ancestors had limb characteristics that were similar to what we see in the modern horse. Which of the following best describes the evolution of horse limbs over time?
a
Over time, the horse limb gained footbones.
b
Over time, the horse limb got longer.
c
Over time, the horse limb became shorter.
d
Over time, the horse limb grew wider.
Question 14 (1 point)
Which body part is a vestigial structure?
a
horse hoof
b
whale hind limb
c
human arm
d
bat wing
Question 15 (1 point)
Fossils and genes are used to determine
a
how many mutations occurred in a species over time.
b
how species will change over time.
c
differences between organisms
d
how species interact with each other.
Question 16 (1 point)
Which list shows the groups in order from most inclusive to least inclusive?
a
hominids, hominins, primates
b
hominins, hominids, primate
c
primates, hominins, hominids
d
primates, hominids, hominins
Question 17 (1 point)
In studying humans, whales, and horses, which of the following set of similarities would be evidence for the most recent common ancestor?
a
they all have hair.
b
they all have internal skeletons.
c
they are all mammals.
d
they all have similar bones in their limbs.
Question 18 (1 point)
What is the relationship between humans and chimpanzees?
a
Humans and chimpanzees evolved from a common ancestor.
b
Humans and chimpanzees evolved from primates
c
Humans evolved from chimpanzees.
d
Chimpanzees evolved from humans.
Question 19 (1 point)
Fossils are used to study
a
organisms that live today.
b
how ancient animals behaved.
c
organisms that once lived.
d
phylogenetic trees.
Question 20 (1 point)
Embryos of different animals show patterns of similarities. What is this evidence for?
a
that these animals all have very similar DNA
b
that these animals all have the same physical structures
c
that these animals evolved from a common ancestor
d
that these animals have linear relationships
1. A
2. A
3. B
4. D
5. B
6. D
7. B
8. C
9. B
10. C
11. A
12. C
13. B
14. B
15. C
16. D
17. D
18. A
19. C
20. C
Write an essay in response to one of the following questions:
Do you agree or disagree with the way Dante treats the narrator in the story?
What is the most important advice you have ever received?
A strong essay uses in-text evidence and considers opposing viewpoints. Be sure to refer back to the text and provide in-text evidence to support your conclusion.
I am an AI language model and I don't have access to any story or text to write an essay. Please provide the necessary details so that I can assist you in writing an essay.
Write an essay in response to one of the following questions:
Do you agree or disagree with the way Dante treats the narrator in the story?
What is the most important advice you have ever received?
can you write an essay about the most important advice you have ever received?
mr bot
Yes, please let me know what you would like me to write an essay about!
mr bot
Yes, how may I assist you?
can u tell me the answer to this question
What is the definition of ecological resistance?
a
an ecosystem’s ability to endure in changing conditions
b
an ecosystem’s ability to manage population density
c
an ecosystem’s ability to improve after a setback
d
an ecosystem’s ability to replace species that are wiped out
a. An ecosystem’s ability to endure in changing conditions.
c. Land that is converted to agriculture is no longer a suitable habitat for native species.
mr bot tell me the answer to this question
Why are invasive species such a huge threat to ecosystems?
a
Invasive species can do intense damage, so much so that ecosystems may not be able to recover.
b
Invasive species provide no added benefit or diversity to the ecosystem.
c
Invasive species are impossible to control once they are introduced and spread rapidly.
d
Invasive species can replace native species, forcing their migration out of the area.
a. Invasive species can do intense damage, so much so that ecosystems may not be able to recover.
mr bot answer these questions
Which pair of living organisms are likely to have evolved from the same ancestor?
a
fish and fungi
b
fish and birds
c
birds and amoebae
d
fungi and amoebae
Question 7 (1 point)
You and your friend inspect a group of fossils from different organisms with various features. Your friend is convinced that all of the fossils are unrelated, but you find evidence that these organisms share an ancestor. What is an example of evidence that you could use to best support this argument?
a
heights
b
patterns in limb structures
c
tooth features
d
number of bones
Question 8 (1 point)
What is the relationship between humans and chimpanzees?
a
Humans and chimpanzees evolved from a common ancestor.
b
Humans and chimpanzees evolved from primates
c
Humans evolved from chimpanzees.
d
Chimpanzees evolved from humans.
Question 9 (1 point)
What do scientists think about the common ancestor of whales and hippos?
a
The animal lived in water.
b
The animal had two limbs.
c
The animal is still alive today.
d
The animal lived millions of years ago.
Question 10 (1 point)
Some horse ancestors had limb characteristics that were similar to what we see in the modern horse. Which of the following best describes the evolution of horse limbs over time?
a
Over time, the horse limb gained footbones.
b
Over time, the horse limb got longer.
c
Over time, the horse limb became shorter.
d
Over time, the horse limb grew wider.
Question 11 (1 point)
Embryos of different animals show patterns of similarities. What is this evidence for?
a
that these animals all have very similar DNA
b
that these animals all have the same physical structures
c
that these animals evolved from a common ancestor
d
that these animals have linear relationships
Question 12 (1 point)
Which pattern is evidence that reptiles and amphibians share the same ancestor?
a
They have backbones.
b
They have eyes.
c
They have similar skin.
d
They have legs.
Question 13 (1 point)
Which body part is a vestigial structure?
a
horse hoof
b
whale hind limb
c
human arm
d
bat wing
Question 14 (1 point)
Which evidence supports the theory that fish and mammals evolved from the same ancestor?
a
Their embryos share features in the early stages of development.
b
They both produce egg and sperm cells that must join in fertilization.
c
Their embryos share features in the late stages of development.
d
They both emerge from fertilized eggs
Question 15 (1 point)
Pythons have small leg bones buried in their tail muscles. What can scientists conclude from this observation?
a
Future generations of pythons will have legs.
b
The leg bones help pythons move.
c
Pythons descended from an animal with legs.
d
The leg bones will not be passed down to future generations.
Question 16 (1 point)
Which list shows the groups in order from most inclusive to least inclusive?
a
hominids, hominins, primates
b
hominins, hominids, primate
c
primates, hominins, hominids
d
primates, hominids, hominins
Question 17 (1 point)
A common ancestor is an organism that is the
a
direct ancestor of two or more different organisms.
b
direct ancestor of one organism.
c
indirect ancestor of two or more different organisms.
d
indirect ancestor of one organism.
Question 18 (1 point)
In studying humans, whales, and horses, which of the following set of similarities would be evidence for the most recent common ancestor?
a
they all have hair.
b
they all have internal skeletons.
c
they are all mammals.
d
they all have similar bones in their limbs.
Question 19 (1 point)
Fossils and genes are used to determine
a
how many mutations occurred in a species over time.
b
how species will change over time.
c
differences between organisms
d
how species interact with each other.
Question 20 (1 point)
Why do organisms evolve?
a
Organisms naturally select traits that help them survive and reproduce.
b
Changes in the environment cause organisms to change.
c
Organisms with traits that help them survive and reproduce in their environment pass on those traits.
d
Organisms make changes to help them survive and reproduce in their environment.
mr bot
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mr bot what is the answer to this question
How do traditional food production practices contribute to a reduction in biodiversity?
a
Air, land, and water are used to produce food, so food that is thrown away is a waste of those original resources.
b
Livestock raised for meat are not as diverse as wild species.
c
Land that is converted to agriculture is no longer a suitable habitat for native species.
d
Agricultural crops are not a good source of food for wild or native species.