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Llana [10]
3 years ago
13

If scientists determine the age of a rock to be three billion years old, what else do they know?

Biology
1 answer:
Mkey [24]3 years ago
4 0
C) The Earth is at least three billion years old. :)
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The incidence of skin cancer has increased dramatically in parts of Australia where people are experiencing greater UV exposure
Marina86 [1]

Answer:

The correct answers are:

1. stratospheric ozone depletion

2. climate change

3. desertification/land degradation

4. freshwater decline

5. biodiversity loss.

Explanation:

1) Stratospheric ozone depletion- ozone layer is the protective layer around the earth that protects us from harmful rays such as UV rays coming from the sun. There are depletions or holes in the ozone layer in some parts of Australia and therefore, therefore leading to skin cancer.

2) climatic change - The change in the average temperature or precipitation of an area that takes place due to global warming that changes the earth's climate is changing rapidly.

3) desertification or land degradation - It occurs due to past overuse of fertilizer or barren land that has zero crop yield.

4 )freshwater decline - freshwater is an essential part of the irrigation of crops in agriculture and due to the downfall of groundwater its decline the freshwater produce in these parts.

5) biodiversity loss - Coral reefs are habitats for many aquatic organisms and used as various ways of biodiversity. If there is a loss or decrease in their numbers it will affect and decline the biodiversity of the area.

7 0
3 years ago
List three pieces of evidence for Pangaea.
kari74 [83]

Answer:The rock formations of eastern North America, Western Europe, and northwestern Africa were later found to have a common origin, and they overlapped in time with the presence of Gondwanaland. Together, these discoveries supported the existence of Pangea.When Rodinia broke up, it split into three pieces: the supercontinent of Proto-Laurasia, the supercontinent of Proto-Gondwana, and the smaller Congo craton. Proto-Laurasia and Proto-Gondwana were separated by the Proto-Tethys Ocean.

Don't take my full word on it, this is what i think

Explanation:

8 0
3 years ago
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What is required for sexual reproduction to occur?
Dimas [21]

Answer:

a d*ck and a yk what-

Explanation:

no need for me to say more,

3 1
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How does commensalism differ from mutualism?
Veseljchak [2.6K]
Answer: Mutualism is a relationship of two organisms wherein both organisms benefit from each other. ... Commensalism is a relationship of two organisms wherein one organism benefit from the other with neither harm nor benefit to the other
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Which of the following terms denotes the chromosomes which are similar in size, shape, and genetic material?
lana [24]

Answer: Each pair of chromosomes consists of two chromosomes that are similar in size and shape. They contain the same genes at the same loci, though they may have different alleles. These pairs of chromosomes are known as homologous chromosomes or homologs.

Explanation:

3 0
2 years ago
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