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Ne4ueva [31]
3 years ago
9

About how many years old is earth

Biology
1 answer:
Serjik [45]3 years ago
5 0

The Earth is around 4.6 billion years old. Earth has a slightly squashed sphere, measuring 7,973 miles (12,756 km) in the diameter at the equator.

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Describe two examples of negative effects air pollutants have on the human respiratory<br> system
Serjik [45]

Answer:

irritate people's breathing, ling cancer, asthma

Explanation:

Particulate matter in the air decreases life expectancy according to many researchers. Pollutants such as ozone irritate people's breathing, trigger asthma symptoms and cause lung and heart diseases. Exposure to environmental tobacco smoke causes many severe respiratory health problems such as asthma and lung cancer.

5 0
3 years ago
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IF SOIL HAS ALL THE NUTRITION , THEN WHY DO WE NEED TO REPLINISH IT
Naya [18.7K]

<em>MARK</em><em> </em><em>ME</em><em> </em><em>BRAINLIEST</em>

Answer:

  1. Continuous cultivation of crops in soil leads to the depletion of certain nutrients.
  2. If these nutrients are not replenished, soil becomes sterile and unfit for cultivation.
3 0
2 years ago
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What is the process in which species evolve in response to changes in each other?
lara [203]
I believe it is behavioural isolation. When there are changes within a certain species, e.g. new birdcalls are formed in certain individuals in a species, "traditional" birds may not like such mating calls and only choose to mate with the more common birdcalls from majority of the birds. There are also some birds that may like the new birdcalls, and choose to mate with birds with those birdcalls. They become genetically isolated as they continue such behavior. Eventually, through genetic drift and other mutations, different species form from a single specie.

Hope this helps! :)
5 0
3 years ago
What are the advantages and disadvantages of using renewable and nonrenewable energy resources? Use evidence from the lesson and
timofeeve [1]

Answer:

The answer to this question is given below in this explanation section.

Explanation:

Advantages of renewable energy resources:

Using renewable energy over fossil fuels has a number of advantages.Here are some of the top benefits of growing green.

  • Renewable energy won't run out:

Renewable energy technologies use resource straight from the environment to generate power.These energy sources include sunshine,wind,tides,and biomass,to name some of the more popular options.

  • Maintenance requirements are lower:

In most cases,renewable energy technologies require less overall maintenance  than generators that use traditional fuel sources.This is because generating technology like solar panels and wind.

  • Renewables save money:

Using renewable energy can help you save money long term.Not only will you save on maintenance costs,but on operating cost as well.When you are using a technology but generates power from from the sun wind team natural processes.

  • Renewable energy has numerous health and environmental benefits:

Renewable energy resources emit little to no greenhouse gases or pollutants into the air.

  • Renewable lower reliance on foreign energy sources:

With renewable energy technologies you can produce energy locally.The more renewable energy you are using for power needs.

Disadvantages of renewable energy:

  • Higher upfront cost:

You can save money by using renewable energy the technologies are typically more expensive upfront by traditional energy generators.

  • Intermittency:

Through renewable energy resources are available around the world many of these resources are not available year around.

  • Storage capabilities:

Because  of this intermittency of some renewable energy resources there a high need of energy storage.

  • Geographic limitations:

The united states has a diverse geography with varying climates topographies vegetations and more.

6 0
2 years ago
Read 2 more answers
Please help me place the cell cycle in the correct order.
kogti [31]

Answer:

Correct order is: <u>Interphase, Mitosis, Cytokinesis.</u>

Explanation:

Interphase will help grow and produce proteins for a cell. Then Mitosis will happen, which is five different stages: prophase, prometaphase, metaphase, anaphase, and telophase. Once those are all finished, Cytokinesis happens.

Hope I could help!

4 0
3 years ago
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