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Angelina_Jolie [31]
4 years ago
7

Why is coal considered a nonrenewable energy source

Biology
2 answers:
Mnenie [13.5K]4 years ago
3 0

Answer:

Coal is a fossil fuel. It comes from the remains of plants that died about 100 to 400 million years ago. Coal is a non-renewable energy source because it takes millions of years to form

statuscvo [17]4 years ago
3 0

Explanation:

Because when coal is used up, it can not be used again, therefore it is nonrenewable

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1. Change the fraction
dexar [7]

Answer:

None of the answers are correct. 1/6 converted to a decimal is 0.16666666666. All of these options would be choices if you wanted to change the fraction 1/8 to a decimal

6 0
4 years ago
Which of the following best describes the process of hydration?
Vesna [10]

Answer:

D that is, water bonds with elements in the minerals that make up rock, forming new substances​.

Explanation:

hope its right!

3 0
3 years ago
The outermost layer of a virion fulfills which of the following functions of the virus?
IrinaK [193]

Answer:

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Explanation:

A virion is a single viral particle. In this form the virus is physically isolable but without metabolic activity. Many virions can even be crystallized.

A virion, infecting a single host cell, is capable of producing thousands of descendants using the mechanisms of DNA replication, transcription and translation of the infected cell. This viral multiplication is often sufficient to kill the host cell by breaking it (lysandola).

Nucleic acid gives infectious power to the virion. It is enclosed by a protein wrap called capsid which is always formed by a number of individual proteins, called structural subunits. These subunits, associating in a specific way, form larger complexes called capsomeres. The set of nucleic acid and proteins is called the nucleocapsid of the virus, which can be enclosed by a membrane called pericapside envelope. Viruses without this membrane are called naked. Virus membranes are made up of a lipid bilayer, often associated with virus-specific proteins.  The main function of the envelope is to help the virus enter the host cell. The surface glycoprotein serves to identify and bind to the receptor points in the host membrane. The viral envelope is then fused with the cell membrane, allowing the capsid and the viral genome to enter.

A step further down the evolutionary scale is the virino and below it the viroid and the prion; higher up is the virus.

8 0
4 years ago
The functions of carbohydrates do NOT include:
son4ous [18]
The answer would be a.

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