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Setler79 [48]
3 years ago
7

During the 1980s, wolves were reintroduced to Yellowstone National Park after decades of absence due to attempted extermination

in the early part of the 20th century. Within 20 years, not only had the wolf population increased, but there was also a dramatic increase in other species, such as aspen, cottonwood, and willow trees, beavers, warblers, insects, and fish. These changes in Yellowstone Park are examples of how important a(n) ________ can be to an ecosystem.
Biology
1 answer:
Dominik [7]3 years ago
6 0

Answer:

Keystone species

Explanation:

Keystone species are such species that had a large effect on the natural environment. Such species are very important species as they play key role in determining and maintaining the the structure of an ecosystem and also decide or fix which type of species will be there in that environment and what will be the number of those species in that particular community. Without these keystone species an ecosystem could completely cease or all species could not work in that same manner all-together. Wolf is one of an important keystone species in the ecosystem.

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makkiz [27]

Answer:

When the heart pushes blood around the body during systole, the pressure placed on the vessels increases. This is called systolic pressure. When the heart relaxes between beats and refills with blood, the blood pressure drops. This is called diastolic pressure.

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How does the digestive system work with the respiratory systrem, muscular system, urinary system, and cardiovascular system work
densk [106]
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5 0
3 years ago
Which of these resources are renewable? Check all that apply.
aksik [14]

Answer:

Wind

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Explanation:

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2. Tides are due to gravitational interaction with the Moon and Sun and the Earth's rotation, so it is classified as inexhaustible.

3. Geothermal energy is renewable because heat is continuously being produced inside the Earth, at the core.

5 0
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Answer:
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Hope it helps! (:

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