What 2 components make up the greatest percentage of the atmosphere?

Answer:

Index fossil that is also known as indicator fossil is used to determine the age of the layers of the rocks. It says that the new layer of sedimentary rocks lie over the old layer.

The deeper we go, the older the rocks we will find. Index fossil of animals that lived or survived only for a short period of time are very useful. An example of index fossil can be Ammonites that were found in Mesozoic era that was about 25-35 million years ago.

Final answer:

Index fossils are used by geologists and palaeontologists to determine the relative age of rock layers and identify different geological periods. They are effective markers of time because they appear in a consistent, limited time span.

Explanation:

Index fossils are a powerful tool used by geologists and palaeontologists. Specifically, these fossils are used to determine the relative age of a layer of rock and identify geological periods. This is possible because index fossils are found to occur in a particular time span, and not beyond that.

For example, let's suppose a fossil of a creature that we know lived about 100 million years ago is found in a rock layer. This suggests that the rock layer would also probably be of the same period. Thus, index fossils serve as benchmarks or points of reference to determine the age of the surrounding materials.

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Nuclear waste:

Atomic waste is one of the most troublesome sorts of waste to oversee on the grounds that it is profoundly dangerous. As indicated by the U.S. Ecological Protection Agency (EPA), atomic waste is arranged into six general classes.

[1-2] These incorporate (1) spent atomic fuel from atomic reactors, (2) uranium factory tailings from mining and processing of uranium mineral, (3) significant level waste from spent atomic fuel reprocessing, (4) low-level waste, (5) transuranic waste from guard projects, and (6) normally happening and quickening agent created radioactive materials.  

The well-being concerns and security issues related with atomic waste present significant limitations on the far reaching utilization of atomic vitality. Because of its b and exceptionally perilous properties, atomic waste is required to be deliberately put away or reprocessed. The putting away and reprocessing are additionally convoluted by the long half existence of the radioactive materials in the atomic waste.

For instance, a portion of the segments can remain half of their hazardous levels even one million years after the fact after generation.

Administration of basic life support is necessary when put in htis scenario.

The first thing to do is to open the airway with the head-tilt/chin-lift maneuver, look-listen-feel for breathing, and if the child is not breathing normally give 2 rescue breathes.

The two types of biomolecules being described in the scenario would be nucleic acids and proteins.

Nucleotides are the building blocks of nucleic acids. Each nucleic acid in the form of DNA or RNA has its nucleotide sequence.

DNA is responsible for the storage of genetic information. In order for genetic information to be expressed, the information in DNA is transcribed into RNA. The genetic codes in RNA are translated to their respective amino acids and linked together by peptide bonds as proteins. Thus, genetic information are usually expressed in proteins and the RNA serves as an intermediate molecule.

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Answer:

D

Explanation:

Answer:

A

Explanation:

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