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MArishka [77]
3 years ago
8

Explain how scientists use geologic time to determine the age of landforms.

Biology
1 answer:
Goshia [24]3 years ago
7 0

Answer:

scientists have developed four different methods of determining the age of the earth. By using these methods, or a combination of them, the age of geological formations created by past events and even the fossilized bones of prehistoric animals can be determined.

Based on the research done by scientists, the Geologic Column, a graph that illustrates earth age, was developed. The Column, with its names for the epochs and eras of time, illustrates what scientists think was taking place in earth history. The three primary methods are:

Radiation Measurement

Stratigraphic Superposition

The Fossil Record

From these methods of dating, scientists have determined that the earth as we know it seems to be about 4.6 billion years old. It is theorized that the earth got its start as a result of what is called the "Big Bang nearly 6 billion years ago. The Big Bang theory holds that all the planets, stars, solar systems, galaxies, etc., are the result of a huge explosion that sent material speeding through space. As time passed, the gravitational force of larger chucks of material attracted the smaller chunks and formed the galaxies and solar systems we see today.

Please allow me to know if I helped by clicking thank you, rating or brainly.

Thank you,

Miss Hawaii

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Comparing DNA Replication and Transcription
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The missing information has been completed as:

DNA Tempelate        complementary DNA    mRNA

3' TTACG 5'                5' AATGC 3'                 5'UUACG 3'

       

3' AAUGC 5'                  5' TTACG 3'            5'UUACG 3'

3' GGCGG 5'                  5' CCGCC3'          5' CCGCC3'

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Explanation:

Some of the sequence of DNA given is in 3' to 5' direction, mRNA sequence is also given.

The DNA is double stranded helix which replicates by semi conservative mode. The two strands unwind to act as a template for other strands. In transcription the 3' to 5' strand acts as a template because RNA synthesis takes place in 5' to 3' direction. mRNA is single strand. It has nucleotides in it from which 3 base pairs acts as a code for amino acid.

The following table shows DNA strand having complementary sequaence and mRNA synthesized.

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3' TTACG 5'                5' AATGC 3'                 5'UUACG 3'

       

3' AAUGC 5'                  5' TTACG 3'            5'UUACG 3'

3' GGCGG 5'                  5' CCGCC3'          5' CCGCC3'

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3' CTGGCTAC5'           5' GACCGATG 3'    3'CUGGCUAC 5'

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