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3 years ago

Select three sports that require participants to be highly fit before the beginning

Biology

2 answers:

KengaRu [80]3 years ago

5 0

Answer: C: rock climbing E: free diving

F: hiking

Explanation:

Rock climbing is a sports activity in which the participants climb up the mountain or hill, or a rocky wall of a appreciable height. The goal of this sport is to reach the highest point or the endpoint in shortest time.

Free diving is the sport, in which the person dives inside the water by holding breath for long until the person reaches over the surface layer of the water body. This practice is different from scuba diving as no breathing apparatus is used in free diving.

Hiking is a sport in which the individuals walk for long to cover a long distance, without using any vehicle in the journey.

The above mentioned sports can only be performed by the participants who are healthy and fit. Their respiratory and cardiovascular system should be free from any disease or disorder so that they can complete their tasks in the sports without becoming weak. Their muscular and skeletal system should also be sound which can facilitate easy and flexible movements during the beginning of the sport.

tangare [24]3 years ago

4 0

I believe the answer is C. E. And F.

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What are all living things made of?

Elis [28]

Answer:

All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.

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2 years ago

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True or false:Meiosis takes place when it is time to replace old cell.Explain

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Answer:

False

Explanation:

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3 years ago

Explain how the terms speed velocity and acceleration are related to each other

muminat

Acceleration is a little more complicated. It is defined as the rate of change of the object's velocity over its change in time. ... Or, if the acceleration is negative, it's called deceleration and describes something slowing down. For something to speed up or slow down, it has to have a certain change in velocity

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3 years ago

In what organelle does respiration take place?

Ymorist [56]

Respiration takes place in the mitochondria

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3 years ago

From a chemical view, how is an amino acid is being recognized by its specific aminoacyl tRNA synthetase?

hammer [34]

During translation, rRNA and tRNA read mRNA in 5´ to 3´ direction. According to the codons being readen, tRNA transfers the correct amino acids to build the polypeptide chain. A codon is a short sequence of three nucleotides that store the genetic information for the aminoacids´ assembly.

Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid through the action of the aminoacyl-tRNA synthase enzyme. The whole complex, amino acid + enzyme + tRNA is named aminoacyl-tRNA.

Each tRNA is recognized by a specific aminoacyl-tRNA synthase enzyme. The enzyme is also capable of recognizing a specific amino acid. Let us say, for instance, that tRNA is specific for phenylalanine. The molecule is attached to the enzyme that is specific for that tRNA(Phe). Then, when the enzyme and tRNA(Phe) are together, they get to find phenylalanine. The enzyme links the aminoacid to the RNA. Once the whole complex is formed, the tRNA gets to pair its anticodon with the mRNA codon. This is,

Recognition of enzyme and the specific tRNA(aa) ⇒ aa being aminoacid
Recognition of enzyme and the specific aminoacid
Linkage of the aminoacid to RNA by the enzyme action
Pairing of tRNA anticodon to mRNA codon.

Considering that there are twenty amino acids available, there are also twenty complexes of aminoacyl-tRNA, one for each amino acid. Each of the mRNA codons represents one of the 20 amino acids used to build the protein. Each amino acid can be codified by more than one codon. Of the total 64 codons, 61 codify amino acids, and one is a start codon. The left three codons are stopping translation points.

tRNA decodes genetic information from the nucleotidic sequence in the mRNA molecule and allows amino acids to align composing the new protein.

Once the new peptidic link joins, placing together the new amino acid to the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.

In conclusion, a specific aminoacyl-tRNA synthase enzyme recognizes a tRNA, which is also specific for a certain amino acid. When together, the enzyme recognizes the amino acid and links it to the RNA. The whole complex is known as aminoacyl-tRNA. Once the tRNA is joined to its amino acid, it gets to pair a codon of mRNA to add that amino acid to the new synthesizing protein.

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3 years ago