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SCORPION-xisa [38]
3 years ago
10

How many essential amino acids must be obtained from food?

Biology
1 answer:
Nitella [24]3 years ago
4 0

Answer:

There are eight animo acids that must be obtained from food because the body does not produce them itself.

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Muscle that allows you to shrug your shoulders or extend your head.
SOVA2 [1]

Answer:

the trapezius muscle.

Explanation:

the trapezius muscles are a pair of triangular muscles that extend over the back of the neck and shoulders, moving the head and shoulder blades.

7 0
3 years ago
Which conditions are common to all three of the following: genetic drift, the founder principle, and the bottleneck effect? a. i
Tcecarenko [31]

Explanation:

Common to genetic drift, the founder principle, and the bottleneck effect:

b. in small populations and result in a decrease in genetic diversity and/or an increase in the occurrence of specific genetic traits

c. when a small group of organisms only reproduce with each other to create a larger population of organisms

d. when the majority of a population is killed off and there are only a few remaining organisms left to rebuild the population

Further Explanation:

During the process of cell division, spontaneous changes within the genome can arise, called mutations. These are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes.

These mutations form variants which become stable within a population, leading to the formation of separate, genetically distinct populations called species.

  • mutations accumulate in a population over time, altering the frequency of alleles or different forms of a gene- this is called genetic drift.
  • In the founder effect, the separation of a group from a larger group can decrease genetic diversity, this can create a genetically distinct population
  • In the bottleneck effect, a population die off or barrier to reproduction increases the genetic drift in the population

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

5 0
3 years ago
Read 2 more answers
Which factor regulates the opening and closing of stomata in leaves?
Studentka2010 [4]
The second one because the pressure guards the cells
8 0
3 years ago
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In January, a small number of eastern cottontail rabbits were introduced into Red Forest. The population curve of the rabbits is
SOVA2 [1]

Answer:

B: 100

Explanation:

Carrying capacity is the point where a population stops growing and stays stable.

6 0
3 years ago
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Calculate the actual size of the organelle (A to B). Show all your workings in microns (um). <br>​
fredd [130]

To measure the diameter of a organelle with a scale line of 1 µm.

  1. Measure the length of the scale line on the micrograph in mm, e.g. 1 µm = 17mm.
  2. Measure the diameter of the organelle in millimetres, e.g. = 60mm.
  3. True diameter of organelle.

<h3>How do you find the actual size of an organelle?</h3>

To calculate the actual size of a magnified specimen, the equation is simply Mixed6 :

Actual = Image size (with ruler) ÷ Magnification.

Thus, this is how we can measure the size of an organelle.

To learn more about organelle click here:

brainly.com/question/14165698

#SPJ1

3 0
2 years ago
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