Asked by science

hey bot, Based on the data below, which group of animals are genetically diverse?
# of different type of species in the world
Birds 9,000+
Bears 8
Horses 350+
Whales 90


(1 point)
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Which biome best supports animals that feed mostly by grazing on grasses and small shrubs?(1 point)
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Which biome best supports animals that feed mostly by grazing on grasses and small shrubs?(1 point)
Responses

polar desert
polar desert

tropics
tropics

mixed forests
mixed forests

savanna
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Which describes a primary role of the pioneer species in an ecosystem?(1 point)
Responses

break down rock into soil
break down rock into soil

protect other species from danger
protect other species from danger

provide food for small animals
provide food for small animals

prevent fertile soil from washing away
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What happens after coral is bleached?(1 point)
Responses

The coral is susceptible to starvation.
The coral is susceptible to starvation.

The coral releases algae into the ocean.
The coral releases algae into the ocean.

The coral produces peroxides.
The coral produces peroxides.

The coral dies immediately.
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The most biodiverse ecosystem in the world is likely a(1 point)
Responses

taiga.
taiga.

tundra.
tundra.

coral reef.
coral reef.

cold desert.
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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?(1 point)
Responses

keystone species
keystone species

apex predator
apex predator

decomposer
decomposer

producer
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Dolphins are animals that live in water, but they do not have gills. What might this suggest about dolphins?(1 point)
Responses

They have another structure to obtain oxygen.
They have another structure to obtain oxygen.

They do not need to release carbon dioxide.
They do not need to release carbon dioxide.

They do not need oxygen.
They do not need oxygen.

They make their own food.
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Which of the following is one response to higher temperatures in a habitat?(1 point)
Responses

more movement
more movement

more fat storage
more fat storage

more sweating
more sweating

thicker fur
thicker fur
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Why is fever an effective response to pathogens?(1 point)
Responses

It can remove pathogens from the body.
It can remove pathogens from the body.

It can signal the body to run.
It can signal the body to run.

It can signal the body to fight.
It can signal the body to fight.

It can inactivate pathogens in the body.
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Beavers, large members of the rodent family in North America, are often referred to as “ecosystem/keystone engineers” by wildlife managers. Ecosystem engineers are described as animals that create, alter, or destroy a habitat. Beavers contribute to river ecosystems by bringing down old and dead trees along riverbanks. They use these trees to make their dams. Although these dams are primarily used for protection and food storage, scientists report that these dams change the surrounding environment in different ways.


Given this information, in three to five sentences, describe a potential benefit that beavers contribute to the ecosystem as keystone engineers and describe a plausible impact that the removal of beavers could have on the surrounding ecosystem.

(4 points)
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A bird-watcher sees a small yellow bird in a tree. Explain to the bird-watcher how he can use a dichotomous key to identify the bird. Assume he does not know anything about dichotomous keys. Then, write two steps of a dichotomous key that would be helpful for the bird-watcher.(2 points)
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Rainbow trout live in the rivers and streams of upstate New York. Rivers in this area are cold and have strong currents. If temperatures fall over time because of climate change, what is one variation that would likely help the trout to survive? Why? Write 1-2 sentences.(2 points)
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Which one of the following animals is most likely to be a keystone species, based on the food web provided?

(1 point)
Responses

Mouse
Mouse

deer
deer

frog
frog

grasshopper
Answered by science
thank you!
Answered by Bot
Birds are genetically diverse.
Answered by Bot
The grassland biome best supports animals that feed mostly by grazing on grasses and small shrubs.
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savanna
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break down rock into soil
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The coral is susceptible to starvation.
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coral reef.
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keystone species.
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They have another structure to obtain oxygen.
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more sweating
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It can inactivate pathogens in the body.
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Beavers play a crucial role in shaping their ecosystem. Their dams create a backflow of water, which helps in the creation of wetlands and slows the flow of water, reducing the risk of flooding downstream. Dead trees left as a result of beaver dams can provide habitats for various wetland-dwelling species. Losing this vital species could cause the decline in the population of the organisms that thrive in the dam-created wetlands. The absence of beavers could also lead to increased erosion and make it difficult for wetland birds to hunt and breed.
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A dichotomous key is a tool used to identify an organism by answering a series of questions about the characteristics of that organism. In order to use a dichotomous key, the bird-watcher will need to observe the bird to answer the questions.

Two steps of a dichotomous key for identifying a small yellow bird could be:

Step 1: Does the bird have stripes on its back?
- If yes, go to step 2
- If no, the bird is not a Pine Warbler

Step 2: Does the bird have black wings?
- If yes, the bird is a Yellow Warbler
- If no, the bird is a Prothonotary Warbler
Answered by Bot
One variation that would likely help rainbow trout survive in the event of falling temperatures due to climate change is for them to develop thicker and longer scales on their skin. This adaptation would better insulate them from the cold water and reduce heat loss through their body surface.
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frog
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You're welcome!