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Mariana [72]
3 years ago
11

The nutrient that is essential to cellular construction, reproduction, and maintenance

Biology
1 answer:
mario62 [17]3 years ago
6 0
Protein is the nutrient that is essential to cellular construction, reproduction, and maintenance. 
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Whic conditions are required for a natural selection?
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Overproduction of offspring, inherited variation, and the struggle to survive.

So: b, d, and e
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A bird eats a worm that eats grass that gets its energy from the sun. What is the first order consumer in this food chain? Selec
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The birds can eat with the worms.

It will help you.
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3 years ago
What is the difference between correlation and causal mechanism? 30POINTS!!!
Vlad1618 [11]

Answer & Explanation:

First, correlation and causation both need an independent and dependent variable. An independent variable is a condition or piece of data in an experiment that can be controlled or changed. A dependent variable is a condition or piece of data in an experiment that is controlled or influenced by an outside factor, most often the independent variable.

If there is a correlation, then sometimes we can assume that the dependent variable changes solely because the independent variables change. This is where the debate between correlation and causation occurs. However, there is a difference between cause and effect (causation) and relationship (correlation). Sometimes these areas can be confused and muddled when analyzing data.

  • You probably know that a correlation is the relationship between two sets of variables used to describe or predict information. There is an emphasis here on relationship. Sometimes we can use correlation to find causality, but not always. Remember that correlation can either be positive or negative.

A positive correlation, where the dependent variables and independent variables in a data set increase or decrease together.  If the numbers sloped downward, then you have a data set with a negative correlation, where the dependent variables and independent variables in a data set either increase or decrease opposite from one another.

Whilst a negative correlation means if the independent variables decrease, then the dependent variable would increase, and vice versa.

  • Causation, also known as cause and effect, is when an observed event or action appears to have caused a second event or action. For example, I bought a brand new bed comforter and placed it in my washing machine to be cleaned. After cleaning the comforter, my washing machine stopped working. I may assume that the first action, washing the comforter, caused the second action, broken washing machine.

<em>I hope this helped! :)</em>

8 0
3 years ago
Read 2 more answers
In freshwater snails, pigment color is influenced by two genes. If two heterozygous pigmented freshwater snails were crossed and
Arada [10]

Answer:

a. (A_B_),(A_bb)(aaB_)(aabb)

Explanation:

This scenario is an example of recessive epistasis.

It involves two recessive alleles concealing the expression of an allele at varying locus.

The 9:7 ratio seen in this case is a rare form of epistasis known as duplicative recessive epistasis (a situation in which the other gene expression are masked due to the effect of either aa or bb presence on them).

In this scenario, if snails possess two copies of one or the other allele I.e allele a or allele b, pigment production would be inhibited leading to albino individuals.

A recessive phenotype is seen for a homozygous recessive gene at Gene A or Gene B.

Therefore, the genotypes of the offspring is AABB, AaBB, AABb, aaBb, aaBB, AAbb, Aabb and aabb.

7 0
3 years ago
Read 2 more answers
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