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Paladinen [302]
3 years ago
15

Which pair of statements best describes an essential amino acid?

Biology
2 answers:
Marta_Voda [28]3 years ago
4 0
It is an amino acid that cannot be made by the body. It must be obtained from eating certain foods.
Allushta [10]3 years ago
4 0

an amino acid that cannot be made by the body. It must be obtained from eating certain foods.

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What type of mutation occurred in the DNA in the table below?
Tasya [4]

Answer:

In the table, the mutation occurred at position 4. TAG is the sequence affected. It is a stop codon. It was mutated into GAG which is Glu. So, yes it would be affected since the stop codon was mutated. The type of mutation that occurred is a base substitution.

Explanation:

3 0
3 years ago
Wich is true of Saturns satellite, Titan?
asambeis [7]

Answer:

Titan's landscape is similar to earth's and show dry rivers and hydrocarbon lakes. it is the only body in the solar system that shows evidence of surface liquid other than earth. It is the only planetary moon in the solar system which has an atmosphere which is rich in nitrogen like earth.

3 0
3 years ago
What will be the approximate volume when the temperature is at 900k
Evgen [1.6K]
In order to determine the volume at a given temperature, you may apply Charle's law, which states that for a fixed mass of gas held at constant pressure, the temperature and volume of the gas are directly proportional. Mathematically, this is:

V / T = constant

Therefore, if the initial volume and temperature are known, we may determine the final volume at 900 K.
8 0
3 years ago
A biologist is studying the possible role of earthworms on the fertility of farm soils. As part of this research, the number of
dimaraw [331]

Answer:

Taking more samples from different parts of an acre.

Explanation:

Validity and accuracy of the data is crucial for any serious research. In this particular case, the most accurate data would be obtained if earthworms would be counted on the whole acre. Of course, this would consume lot of time, people, money etc. That's why methods for estimation are used. Estimation best works with large number of samples. Since one acre equals over 4000 square meters, taking only five samples from such a big area is simply not enough for obtaining valid data.

One of the possible ways to improve estimation is to take more samples per acre while avoiding taking adjacent samples because it could be possible that number of earthworms in one part of an acre is increased (or decreased) for any reason, which would lead us to wrong conclusion.

8 0
3 years ago
A protein that spans the phospholipid bilayer one or more times is
Leona [35]

Answer:

a transmembrane protein

Explanation:

A transmembrane protein spans the phospholipid bilayer one or more times. they are made of amphiphilic phospholipids: phospholipids with a hydrophilic phosphate head and a hydrophobic tail with two fatty acid chains.

7 0
3 years ago
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