What are the variables in biology, encyclopedia, what are the variables of organisms

Variables are divided into independent, dependent, and irrelevant variables.

Generally, in biological research, there is an artificially controlled quantity that can be adjusted or changed, that is, an independent variable, and the amount that changes due to the change of the independent variable is the dependent variable, and other change factors are irrelevant variables.

**In the change of photosynthetic rate with light intensity, light intensity is the independent variable, photosynthetic rate is the dependent variable, and others (such as temperature, pH, concentration of carbon dioxide, growth state of the plant being studied, amount of each solution, etc.) are irrelevant variables, and the irrelevant variables should be consistent during the experiment, and the photosynthetic rate only changes due to the change of light intensity throughout the experiment, so as to follow the principle of single variable.

Extended Information: Notes on Biological Variables:

Peptide chains are formed by dehydration and condensation between amino acids to form peptide bonds. Suppose there are n amino acids, and m peptide chains are formed by dehydration and condensation, and the number of water molecules removed is equal to the number of peptide bonds formed, and a peptide bond contains 1 oxygen atom, and it should also be noted that 1 peptide chain contains at least 1 carboxyl group and 2 oxygen atoms. Many students tend to ignore this when calculating.

The calculation of peptide bond number, peptide chain number, water molecule number and ammonia number and carboxyl number in the process of protein formation, if there are n amino acid molecules condensed into m peptide chains, (n-m) peptide bonds can be formed, (n-m) water molecules can be removed, at least m amino groups and carboxyl groups each, free amino group or carboxyl number = number of peptide chain + amino group or carboxyl number contained in r group.

Calculating the correlation coefficient between the two pairs of independent variables and the P value corresponding to the age of the wild mountain are generally considered to be the correlation coefficients, and the existence of collinearity between the independent variables can be considered when p", which can be used as a method for preliminarily judging multicollinearity.

Follow the principle of a single variable, and strictly control irrelevant variables: equal volume, same growth, same suitable conditions, etc. Avoid the interference of accidental factors, facilitate the average value, and be more convincing.

Question 1: What are biological variables Independent variables: variables of different groups when designing experimentsDependent variables: Experimental results are different because of different independent variables, and the results are dependent variablesIrrelevant variables: variables that are not related to the results of the real hidden slip test.

Question 2: How to understand independent variables and dependent variables in biology Independent variables refer to the factors or conditions that are actively manipulated by experimental researchers to cause changes in the dependent variables, so the independent variables are regarded as the reasons for the change of the dependent variables. For example, in experiments that study the relationship between enzyme activity and temperature, the change in temperature is the independent variable and the change in enzyme activity is the dependent variable.

Question 3: Is there an independent variable and a dependent variable in living organisms Yes!

The factors that can be changed during the experiment are called variables. Among them, the variable that changes artificially is called the independent variable, and the variable that changes with the change of the independent variable is called the dependent variable. In addition to the independent variables, there may be some variables during the experiment that affect the results of the experiment, and these variables are called irrelevant variables.

Variables are divided into independent, dependent, and irrelevant variables.

Generally, in biological research, there is an artificially controlled quantity that can be adjusted or changed, that is, an independent variable, and the amount that changes due to the change of the independent variable is the dependent variable, and the other changing factors are the non-annual disadvantages.

**In the change of photosynthetic rate with light intensity, light intensity is the independent variable, photosynthetic rate is the dependent variable, and other (such as temperature, pH, carbon dioxide concentration, growth state of the studied plants, the amount of each solution, etc.) are independent variables, and the irrelevant variables should be consistent during the experiment, and the photosynthetic rate only changes due to the change of light intensity in the whole experiment, so as to follow the principle of single variable.

Question 1: What are the biological variables Independent variables: variables of different groups of variables in the design of the experimentDependent variables: The results of the experiment are different because of the different independent variables, and the results are dependent variablesIndependent variables: variables that are not related to the results of the experiment.

Question 2: What are the variables in biology, encyclopedia refers to the specific factors or conditions that are made in the process of experiments.

Also known as an independent variable, it refers to a factor or condition that is manipulated by the experimenter in an experiment. Response variables, also known as due to the collapse variables, refer to the changes and outcomes caused by experimental variables in an experiment. In general, the experimental variable is the cause and the reaction variable is the effect, and there is a causal relationship between the two.

The purpose of the experiment is to obtain and explain this antecedent. For example, in the real resistance test of temperature on enzyme activity, the given low temperature (ice cube), moderate temperature (37), and high temperature (boiling water bath) are the experimental variables. Due to the change of low temperature, suitable temperature and high temperature conditions, the reaction results of salivary amylase hydrolysis of starch also change, which is the reaction variable, and the experiment is to obtain and explain the temperature change.

experimental variables) and the activity of the enzyme (response variable).

The factors that can change in an experiment are called variables, where the variables that are artificially changed are called independent variables, and the variables that change with the change of independent variables are called dependent variables.

For example, to study the decomposition rate of catalase at different temperatures, the independent variable is temperature.

The dependent variable is the decomposition rate of hydrogen peroxide (or the activity of enzymes at different temperatures), you can take a look at the Biology Compulsory Textbook of the People's Education Edition Chapter 5 Section 1 Enzymes that reduce the activation energy of chemical reactions There is an introduction to this.

Independent variables are variables that are manipulated and mastered by the experimenter. eg。Ensure that the humidity and temperature are constant, and study the effect of sunlight on biological growth. The independent variable is the presence or absence of sunlight or the strength or weakness of the sun. Generally, the variable control method is tried.

Independent variables are variables that are manipulated and mastered by the experimenter. The term independent variable comes from mathematics. In mathematics, y=f(x). In this equation, the independent variable is x and the dependent variable is y.

Extraneous variables ......

To do the experiment, it is required that the control group and the experimental group have only one independent variable (e.g., the effect of light on photosynthesis, light is the independent variable).

The quantities that are not related to the experiment are called irrelevant variables, but the irrelevant variables should be guaranteed to be the same and appropriate (for example: the influence of light on photosynthesis, the size of the leaves should be the same, the temperature should be the same and suitable, etc.).

So in the question you asked, the leaf and the filter paper are not the same size, and they should be irrelevant variables.

Hope it helps.