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Vikentia [17]
3 years ago
12

A student put the powder to the corom board . Sciencetific reason for adding powder is ,

Biology
1 answer:
kondaur [170]3 years ago
8 0

Answer:

B or D

Explanation:

think of it how you use chalk on a chalk board, its less friction using chalk instead lets say a marker on a white board.

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Are these right???
Dennis_Churaev [7]
My answers would be as follows:

<span>1. The humanistic approach emphasizes __________ in development and behavior.

-free will

2. which humanistic theorist developed a hierarchy of needs?
-Abraham Maslow

3. Another way to characterize humanistic psychology is its emphasis on _________.
-the self

4. Which of the following is primary, or must be met first, in Maslow’s hierarchy?
-physiological needs

5. Using you prior knowledge about developmental theory as a guide, which of the following best supports Maslow's assertion that love is a need that is essential to survival.
-Without the opportunity for “love” in the form of contact comfort, people are unable to form attachments, often lead difficult, maladaptive lives, and sometimes fail to thrive at all

Hope this helps. Have a nice day.</span>
4 0
3 years ago
Read 2 more answers
A diploid somatic ("body") cell has 2n=20 chromosomes. At the end of mitosis, each daughter cell would have ______ chromosomes.
Nostrana [21]

Answer:

1. 20 chromosomes

2. 10 chromosomes

3. 10 chromosomes

Explanation:

1. The process of mitosis results in the two daughter cells from the same parental cell with exactly the same genetic material. Thus the two cells contain the same number of chromosomes as the parent cell. Therefore if a cell with 20 chromosomes undergoes mitosis will result in the 20 chromosomes.

2. During meiosis I two daughter cells are formed with different ploidy levels as the number of the chromosome reduces to half. Therefore the cell with 20 chromosomes results in two cells with 10 chromosomes.

3. During meiosis II, the two daughter cells formed from meiosis I result in the formation of two more daughter cells with an exact number of chromosome number that is 10 chromosomes.

7 0
3 years ago
A student performed an experiment with bags of dialysis tubing filled with distilled water to model the process of osmosis. Dial
Reil [10]

Answer:

Taking into account the principle of osmosis, the question that best addresses experimental design is  <em>How does the effect of environmental sucrose concentrations impact the  movement of water across a membrane?</em>

Explanation:

The experimental design of the student, made with dialysis bags and sucrose at different concentrations should recreate the principle of osmosis, of importance in living beings for organic homeostasis.

Osmosis consists of the movement of water - through a semi-permeable membrane - from a less concentrated solution to a higher concentration solution, following a gradient, to achieve balance.  

The student will observe in his experiment that water moves from the solution with less sucrose concentration to the higher concentration of sugar. Beakers with the highest concentration of sucrose will have the highest weight, due to the increase in liquid volume.

How does the effect of environmental sucrose concentrations impact the  movement of water across a membrane?

The experiment shows that:

  1. The water from the beaker with less sucrose concentration moved -through the dialysis tubes and the membrane- to the beaker containing the most concentrated sucrose.
  2. Different sucrose concentrations will attract different amounts of water, which influences the final weight of each container.

With this experiment the principle of osmosis is confirmed, where the concentration of a solute determines the amount of water that passes through a semipermeable membrane -following a concentration gradient- until equilibrium is reached.

Learn more:

brainly.com/question/1517477

7 0
3 years ago
Read 2 more answers
What contracts to pump blood out of the heart?
OlgaM077 [116]
Left ventricular must be right answer
6 0
3 years ago
Read 2 more answers
What is red shift? How does it affect earth and our solar system?
Sauron [17]
Redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum
7 0
3 years ago
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