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defon
2 years ago
5

Keystone species affect the populations of many other species in a community. True False

Biology
1 answer:
Zolol [24]2 years ago
4 0

Answer:

True

Explanation:

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Fossils are often found in ____________ because it is formed from the remains of once living things.
Sever21 [200]
<h2>Answer</h2>

Fossils are often found in <u>Sedimentary</u><u> </u><u>rocks</u> because it is formed from the remains of once living things.

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2 years ago
Centrosome is the region of chromosome where two sister chromatids are connected.
Zinaida [17]

False, that is a close answer and can be easily confused with the right answer which is "Centromere" it is the specialized region of the chromosome where two sister chromatids are most closely attached.

The centrosome is like the organization center in the process of cell division. Has two centrioles.

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3 years ago
What did emile durkheim say about social deviance?
stiks02 [169]
<span>The reaction to it promotes social unity.</span>
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3 years ago
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Describe TWO environmental consequences, other than those related to the loss of boreal forest habitat, that result from the ext
Morgarella [4.7K]

Answer: The greenhouse gas emissions from the extraction of bitumen and the use of large quantities of water.

Explanation:

Bitumen is a natural flammable organic matter formed from kerogen in the process of petroleum generation, which is soluble in carbon disulfide. Asphalt and mineral wax are examples of hydrocarbons which are part of bitumen. Conventional oil is extracted by wells while <u>oil sands deposits are extracted using surface mining sectioning techniques, or are flowed to wells by in situ techniques that reduce bitumen viscosity by steam and/or solvents.</u> So, unlike crude oil extracted in oil wells, bitumen requires an open-pit mining operation, in which large tracts are washed with a mixture of water and chemicals to separate the bitumen from a mixture of sand and clay.

Two consequences of this practice are:

  • The greenhouse gas emissions from the extraction of bitumen are larger than the extraction of conventional oil. The emissions produced contribute  to enhance the greenhouse effect and cause global warming. The greenhouse effect occurs when certain gases retain part of the energy emitted by the earth's soil when heated by the sun's radiation. This phenomenon occurs naturally, and thanks to it, the average temperature of the Earth is about 14º C (57.2 °F). The problem occurs when these greenhouse gases increase in the atmosphere and the amount of energy that is not released into space also increases and, with it, the Earth's temperature.
  • The extraction of bitumen from oil sands requires the use of large quantities of water, and even though water used here can be recycled, only a small amounts is returned to the natural cycle. Also, spills from the transportation of the oil could damage soils and waterways, increasing water pollution. This toxic water  could get into surface.
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2 years ago
What is a substrate?
Lady_Fox [76]
A substrate is a reactant that is catalyzed by an enzyme.
4 0
3 years ago
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