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Ivan
3 years ago
10

One hypothesis for the original function of precursors of charged trna is that

Biology
1 answer:
lana66690 [7]3 years ago
4 0

tRNA-precursors were smaller than the modern tRNA and their primary function was to participate in the formation of new structures by joining two or more RNA molecules.

The adaptor hypothesis is the explanation of how information could be extracted from a nucleic acid into a string of amino acids in a specific sequence. The proposed explanation involved recognition between the adaptor (today tRNA) and the template nucleic acid .


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How do scientists know what is happening within a landfill and what data do they collect to tell them the health of the surround
Lady bird [3.3K]

Answer:

Scientist come to know about the land feel by various measures such as quantity of methane gas, quantity of radioactive materials, etc. They collect data from a particular area and checks it whether it is under critical range or not.

Explanation:

Land-filling is a process by which all the waste which is solid is buried under the ground. It is also a type of land pollution. It degrades the land quality. The land is no more fertile to grow crops. some of the waste are also radioactive which harmful effect the animals and plant living in that area. It also tends to have the humans living nearby that area. this area is also capable of creating methane gas which is very explosive in nature.

Scientist plays an important role for finding out the critical condition of land. They also have instrument which are very helpful for finding out the critical range of the radioactive materials.

5 0
3 years ago
Which of the following is NOT a necessary characteristic of life?
jeka57 [31]

Answer:

I would say B?

Explanation:

5 0
2 years ago
Read 2 more answers
A negative tropism is when a plant grows towardaway from a stimulus.
klasskru [66]
A negative tropism is when a plant grows away from stimulus
8 0
3 years ago
Vectorborne transmission of an infectious organism occurs via? a) animals or insects. b) smoke or dust. c) direct contact. d) in
tekilochka [14]

Vectorborne transmission of an infectious organism occurs via <u>animals or insects. </u>

Vectors are living organisms that can transfer an infectious disease from infected animals to humans. These species are known as arthropods. It includes mosquitoes, ticks, triatomine bugs, sandflies, etc.

There are two types of vectors; Biological and mechanical.

Biological vectors such as mosquitos transmit the disease by biting the host body. Mechanical vectors on the other hand cause infectious disease just by physical contact.

Arthropod vectors are cold-blooded. The diseases that are transmitted by them are known as vector-borne diseases. Malaria and Dengue are examples of vector-borne diseases.

If you need to learn more about vector-borne diseases, click here

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4 0
1 year ago
(Fill in the blank)
prisoha [69]

Answer:

Capsule

Explanation:

In many bacterial species, an extracellular layer composed of a polysaccharide especially a monosaccharide is produced around the cell wall of the bacteria. This extracellular layer is known as the slime layer or the capsule.

The capsule in bacteria serves many purposes like it protects the bacteria from the destruction by the white blood cell in the host, it enables the bacteria to adhere to the substrates and protect it.

In the plant group called the bryophytes also a capsule structure is present which grows in the sporophytic phase and encloses the spores, therefore, the capsule is considered the sporangium of the bryophytes.

Thus, the capsule is correct.

7 0
3 years ago
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