1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
natita [175]
2 years ago
5

Which of the following is not found in an observational study? A-controlled variable B-manipulated variable C-None of these are

found in an observational study. D-control group
Biology
1 answer:
Lunna [17]2 years ago
8 0

Answer:

C-None of these are found in an observational study

Explanation:

(A.) controlled variables are a part of what's found in a controlled experiment. (B.) manipulated variables are a part of what's found in a controlled experiment. (C.) Answer choice A. or Controlled variables, Answer choice B. or Manipulated variables, and Answer choice D. or Control groups are a part of what's found in a controlled experiment. (D.) Control groups are a part of what's found in a controlled experiment. Therefor this only leaves one answer and that answer is Like I said C-None of these are found in an observational study.

You might be interested in
What kind of bonding occurs between carbon atoms, allowing carbon to form stable molecules?
brilliants [131]

Answer:

The correct answer is single,double and triple covalent bonds .

Explanation:

A carbon atom can form a single bond with another carbon atom example ethane.

A carbon atom can form a double bond with another carbon atom example ethylene

A carbon atom can form a triple bond with another carbon atom example acetylene.

 But during the formation of  Carbon carbon single bond or double bond or triple bond the valency of carbon atom that is 4 is always maintained.

5 0
3 years ago
Explain the biological structure hierarchy of the human body and the role of homeostasis in maintaining the body. Include the fo
Nuetrik [128]

Answer:

1. Biological structure of the human body

The human body is organized in different levels according to their complexity.

The levels are the folowing (increasing complexity).

1. Atom (N, O, C,..)

2. Molecule (Protein, lipids, water...)

3. Organelle (mitochondria, golgi apparatus,...)

4. Cell (blood cells, bone cell,..)

5. Tissue (connective tissue, epithelial tissue,..)

6. Organ (lungs, kidney,..)

7. Organ system (skeletal system, muscuar system,...)

8. Organism (the human body)

Each of the levels is formed by an agrupation of the previous level. For example, cells are formed by a number of organelles, and a group of cells form a tissue.

Cells are the basic units of structure of the body, and there are different types of them.

2. Homeostasis

Homeostasis is a process of the body by which the organism works to maintain a stable internal environment, while adjusting to changes in the external environment.

This process is possible because of the work of both the nervous system and the endocrine system. While the first controles the body's activities and detects the necesity of adjustments, the second regulates the activities by using hormones.

6 0
1 year ago
9. On some small islands in the Pacific Ocean, the average sea level is rising on the beaches little by little each year. Reside
Lelu [443]

Answer:

the answer is always c trustttt

4 0
2 years ago
What is the definition of the word enzyme
ANTONII [103]

Answer:

any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures

3 0
3 years ago
Read 2 more answers
A population of wild-flowers was scored for flower color. There were 302 blue (BB) plants, 1857 violet (BR) plants and 811 red (
Paul [167]

Answer:

frequency of the blue (B) allele = 0.4142

frequency of the red (R) allele = 0.5858

The number of blue plants expected is 509.652

The number of red plants expected is 1019.304

The anticipated number of violet plants is 1441.341

Calculated chi square value

= 84.5320 + 42.5688 + 119.8692\\= 246.97

Explanation:

Frequency of blue allele is

Frequency of blue allele is equal to sum of frequency of BB and half of frequency of BR

\frac{302}{2970} + \frac{1}{2} \frac{1857}{2970} \\= 0.1016 + 0.3126\\= 0.4142

Frequency of other allele

1- 0.4142\\= 0.5858

Chi Square test

See the attached file

The number of blue plants expected is 509.652

The number of red plants expected is 1019.304

The anticipated number of violet plants is 1441.341

Calculated chi square value

= 84.5320 + 42.5688 + 119.8692\\= 246.97

7 0
3 years ago
Other questions:
  • The elements of the Earth undergo chemical reactions that build molecules, destroy molecules, and change molecules into other mo
    9·1 answer
  • Changes in a person's height and weight during middle adulthood are accompanied by a decline in
    15·1 answer
  • In this reaction _____. A scheme of a chemical reaction. The reactants are two molecules, one of which consists of A and B, and
    12·1 answer
  • Cholesterol belongs to which category of organic molecules?
    15·1 answer
  • What do you think would happen if there was more glucose (sugar) than available NAD+? Explain.
    8·1 answer
  • According to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts?
    12·2 answers
  • An organism is currently using light energy to make food. Based on what you have learned, this organism will be best classified
    11·1 answer
  • Meaning of one tailed test and two tailed test
    8·1 answer
  • Why do living organisms need carbon?<br> hurry!
    14·2 answers
  • Aside from neurons, epithelia are the only other tissue that can sometimes serve as?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!