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3 years ago

Match each change of state with its description.

Biology

1 answer:

Llana [10]3 years ago

3 0

Answer:

the process by which a solid becomes a liquid - melting.

the process by which a liquid becomes a solid - freezing.

the process by which a solid becomes a gas - sublimation.

vaporization that occurs at the surface of a liquid - evaporation.

vaporization that occurs below the surface of a liquid - evaporation.

Explanation:

Hope it helps .

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ANOTHERRR ONE PLEASEEE HELPP I ALSOOO NEED THE EXPLANATIONNN

Misha Larkins [42]

Answer:

1. What process involves planting large areas with a single highly productive crop year after year?

Monoculture.

2. In a food chain, the concentration of a pollutant increases as the number of organisms at a trophic level decreases. This process is called:

Biomagnification.

Explanation:

For no. 1:

Monoculture means cultivating in one crop only in large areas. "Mono," means one and "culture" means to "cultivate" or "grow" in this scenario.

For no. 2:

Biomagnification is the accumulation of toxins in the body at different trophic levels in the food chain. "Bio," relating to a living thing or organism, and "magnification" to "grow larger" or "increase."

Hope this helped ^^

4 0

3 years ago

A friend receives the results of a urine test and finds that dissolved nutrients, such as amino acids and glucose, are present i

DerKrebs [107]

Answer:

Proximal tubules.

Explanation:

The proximal tubules make up a significant portion of the kidneys and they are also the site of active solute secretion, hormone production, and many of the metabolic functions of the kidney. This segment of the nephron in kidney has two main functions: absortion and secretion. A hundread percent of organic solutes, such as glucose and amino acids are reabsorbed, that's why they should not be present in his urine.

8 0

3 years ago

most earth scientists support the fact that our planet is experiencing anthropogenic (manmade) climate change. elaborate on at l

Sliva [168]

1. Temperatures are extreme; mostly high or very cold temps (only winter and summer it feels like). They have changed over years.

2. Polar ice caps (glaciers) are melting drastically.

3. Habitats/ecosystems such as the coral reef are suffering and are expected to disappear over the course of 10-20 years

8 0

3 years ago

Which of the following strategies would least likely help conserve the environment?

Fed [463]

Answer: i guess it is the option (c) because Pesticides are poisonous and, unfortunately, they can harm more than just the “pests” at which they are targeted. They are toxic, and exposure to pesticides can cause a number of health effects. They are linked to a range of serious illnesses and diseases from respiratory problems to cancer.

Explanation:

7 0

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.

6 0

3 years ago