Which part of the scientific method allows biologists to share their findings with other scientists?

Answers

Answer 1
Answer: reporting information
Answer 2
Answer: Reporting the information.

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Juana performs the calculation below. 6.05 + 3.156 + 5.0 How should she report the answer using the correct number of significant figures?

Answers

 Juana performs the calculation below. 6.05 + 3.156 + 5.0 
            1
         6.05
+       3.156
+       5.0     
      14. 206 =>The answer has 5 significant figures.

Here are the three rules on determining how many significant figures are in a number that you must remember: 

-Non-zero digits are always significant.
-Any zeros between two significant digits are significant.
-A final zero or trailing zeros in the decimal portion ONLY are significant.


THE CORRECT ANSWER isC. 14.2

Which of the following is a change from a more condensed to a less condensed state of matter?Boiling

Condensing

Freezing

Solidifying

Answers

By the term "condensed", this refers to the density of a state of matter. As a rule of thumb, solids are the most dense because their molecules are very close together. Next is liquids because they flow compared to solids. The least dense are gases. Therefore, a change from a more condensed state to a less condensed state is boiling (liquid to gas).

explain the genetic events that enable so many different cell types to arise from one unspecialized cell

Answers

All cells in the body have the same genetic material, e.g. they have same DNA. However, not all genes are active at the same time and in all cells. Thus, different genes are transcribed in different specialised cells. There are transcription factors that control which genes will be transcribed and which will be suppressed. Also, specialised cells in an embryo release signalling proteins that help in cell differentiation.

What is selective permeability?

Answers

Selective permeability, made possible in cells by the phospholipid bilayer that makes up the plasma membrane, is basically monitoring and regulating what can and can't enter the cell. It is carried out by a series of membrane proteins that act as channels to polar molecules, opening to allow them in and closing to prevent their entry. This is possible because the hydrophobic tails of the phospholipid molecules repel polar molecules and so prevent their entry unless through a channel.

Which statement is true about macromolecules?a. simple sugars are made of polysaccharides.
b. glycerol is made of fatty acids.
proteins are made of amino acids.
nucleotides are made of nucleic acids.

Answers

proteins are made of amino acids  is the true statement.

Final answer:

The correct statement about macromolecules is 'Proteins are made of amino acids'. It should be noted that in other options, the statements have a part reversed and therefore they are incorrect.

Explanation:

The correct statement about macromolecules is 'Proteins are made of amino acids'. Macromolecules are large, complex molecules that have a high molecular weight. They are mostly built from single subunits, or building blocks, called monomers. In this context, amino acids are the monomers that make up proteins which are a type of macromolecule.

To provide some clarity on the incorrect options: `Simple sugars are not made of polysaccharides` but the other way around. Polysaccharides are complex carbohydrates that are made up of simple sugar monomers. Similarly, `glycerol is not made of fatty acids`, rather, it combines with fatty acids to form lipids. Lastly, `nucleotides are not made of nucleic acids`, but nucleic acids are made of nucleotides. So, it's important to understand the relationships between these biochemistry terms to correctly understand the nature of macromolecules.

Learn more about Macromolecules here:

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The measure of the size of a surface

Answers

Answer:

Area

Explanation:

  • The area is the extent of measurement of any given surface.
  • The surface whose extent is measured needs to be two dimensional.
  • The S.I. unit to measure the surface area is the square meter. 
  • It is very easy to measure the area of any surface and there are well-defined formulas to measure the surface area of different surfaces having varied shapes. 
The size of a surface or region is its area.