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3 years ago

why do some scientists theorize that global warming might not be the result of increases in atmospheric carbon dioxide

Biology

1 answer:

PtichkaEL [24]3 years ago

8 0

Explanation:

In Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes not related to human activity. Most often, global climate has changed because of variations in sunlight. Tiny wobbles in Earth’s orbit altered when and where sunlight falls on Earth’s surface. Variations in the Sun itself have alternately increased and decreased the amount of solar energy reaching Earth. Volcanic eruptions have generated particles that reflect sunlight, brightening the planet and cooling the climate. Volcanic activity has also, in the deep past, increased greenhouse gases over millions of years, contributing to episodes of global warming

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3 years ago

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Rus_ich [418]

Competition help to regulate population growth since only those who are able to obtain food survive.

Crop plants and weeds may compete for water and for sunlight.

Farmers spray herbicides early in the growing season to avoid competition between crop plants and weeds.

<h3>What is the effect of competition on population?</h3>

Competition among species help to regulate population growth by ensuring that only those who are able to obtain food survive. Thus, only fit individuals of a species survive.

Crop plants and weeds may compete for water because water enables them to carry out metabolic activities of growth and development.

Crop plants and weeds may also compete for sunlight and they need sunlight to carry out photosynthesis.

Farmers spray herbicides early in the growing season in order to avoid or reduce competition between crop plants and weeds.

In conclusion, competition among species helps to control overpopulation.

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2 years ago

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Answer:

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3 years ago

A manager wanted to test whether the amount of noise in a clothing factory affected how

Vitek1552 [10]

Answer:

When seeking to determine the number of shirts made by employees subjected to noise with and without the use of headphones, the independent variable is the amount of noise.

Explanation:

During an investigation, the independent variable may be subject to change, in order to observe the effect it will have on the dependent variable.

In the case presented, the amount of noise to which employees are exposed represents the independent variable, which is modified by the use of headphones that block all or part of the noise.

The productivity —expressed in the number of shirts made— can be expected to be higher for employees not exposed to noise.

Other options do not apply because:

The number of shirts made by the employee. Dependent variable .
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