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Phoenix [80]
3 years ago
9

7)

Biology
2 answers:
kow [346]3 years ago
3 0

Answer: The answer is Ozone

Explanation:  The ozone acts like a filter for shorter wavelength  and highly hazardous  uv light. It protects the life on earth.

scoray [572]3 years ago
3 0

Answer:

The correct answer is A) ozone

Explanation:

Ozone(O₃) is a layer made up of 3 oxygen molecules and present in the stratosphere layer of atmosphere. The ozone layer absorbs most of Sun's ultraviolet rays and protect us from UV radiation. These ultraviolet light are harmful to animals and humans and can cause skin cancer.

In the stratosphere, ozone is continuously converted into molecular oxygen by UV radiation which breaks O₃ into O₂ and O. Then again this O₂ converts into O₃ so the process is interchangeable.

The radiation blocked by ozone cause the heating of the stratosphere so ozone plays important role in maintaining the temperature of the earth's atmosphere.

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Presently, we have one of the lowest sea levels in Earth's recorded history. In other words, we are in an _________ and the cont
olya-2409 [2.1K]

Answer:

The correct answer is option a-"oceanic lowstand".

Explanation:

An oceanic lowstand is defined as a geological phenomenon at which the sea level is at a low point and the continents are mostly emergent. The Earth has been on onceanic lowstands historically. This has been identified by different evidence, including the Gulf Coast rivers formation of braided channels.

5 0
3 years ago
For what molecule do genes contain the instructions for building?
zimovet [89]
A gene is a small section of DNA?<span> that contains the instructions for a </span>specific<span>molecule, usually a </span>protein?. The purpose of genes?<span> is to store information. Each gene contains the information required to build </span>specific proteins<span> needed in an organism. The human genome</span>?<span> contains 20,687 </span>protein<span>-coding genes.</span>
4 0
3 years ago
Which microscope would be MOST useful for examining the contours of the surface of a bacteria cell?. A)compound light microscope
Gala2k [10]
The correct option is C.
Scanning electron microscope is a type of microscope that uses beams of electrons that are reflected to form images to scan the surfaces of mounted biological specimens. High resolution, three dimensional images can be obtained via the reflected beam of electrons. Thus, the electron scanning microscope is the perfect microscope for examining the contours on the surface of a bacterial cell.
3 0
3 years ago
Read 2 more answers
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

7 0
3 years ago
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Neko [114]

The correct answer is haploid i just took the quiz and got it right plz mark brainiest

5 0
3 years ago
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