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Crank
3 years ago
13

Why do you think DNA is duplicated before

Biology
1 answer:
Anna71 [15]3 years ago
5 0

The two cells that result from a single cell need to have the same amount of genetic material as the initial cell, therefore the DNA needs to be duplicated before the cell divides.

The sister chromatids are attached together so that during anaphase the daugther cells will receive the same chromosomes

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What factor defines all groups in the Köppen system, with the exception of dry climates? evaporation precipitation air pressure
Liula [17]

Answer:

temperature

Explanation:

I choose temperature because it tells how hot,cold,dry and warm somethings are meanwhile evaporation is when water changes from liquid to gas,so that means water gets hot.

Precipitation is when water released from the cloud to form rain,freezing rain,sleet,snow,or hail.Which means thing get cold.

Air pressure also affect evaporation, which means that water will not be able to come up of the surface of a body of water.So that means the the pressure will be pushing down on the surface of the water.

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Question 3 of 10
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I think the right answer is b
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Which of the following best describes the movement of energy in an ecosystem
balu736 [363]

Energy is started from the sun, with 100 percent of the energy given to plants. when the plants are eaten, only 10% of that energy is given to the animal, like a rabbit. When the rabbit is eaten by a larger predator, only 10% is given of the rabbits energy. This continues, so to find the amount of energy within a certain organism you would need to calculate 10% from each original source of energy

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3 years ago
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Define two classes of natural resources.
Ulleksa [173]

i think it is non renewable resources and renewable resources

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A total of _____ amino acids compose the majority of protein in living things and nine are _____ to human
Delicious77 [7]

Most proteins in living organisms are composed of 40 amino acid residues in total, and nine of those are crucial for human health.

Which majority of amino acids make up proteins in living things?

  • Only twenty different amino acids, each with a distinct side chain, make up proteins. Different chemistries can be found in the side chains of amino acids. The majority of amino acids contain side chains that are nonpolar.
  • There are nine essential amino acids:
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  3. isoleucine
  4. leucine
  5. lysine
  6. methionine
  7. phenylalanine
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What Constitutes Proteins?

  • Amino acids are the basic units of proteins. They are tiny chemical compounds with an alpha (central) carbon coupled to an amino group, a carboxylic acid group, hydrogens, and a changeable element known as a side chain.
  • A protein is made up of a lengthy chain of amino acids that are connected by peptide bonds. The biological process that links the carboxyl unit of one amino acid towards the amino group of a nearby amino acid results in the extraction of a water molecule, forming peptide bonds. The main structure of a protein is thought to be its linear amino acid sequence.

Learn more about amino acids here:

brainly.com/question/11843803

#SPJ4

8 0
1 year ago
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