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Thepotemich [5.8K]
3 years ago
5

In humans which of these types of cells generally do not divide after they have developed?

Biology
2 answers:
Snezhnost [94]3 years ago
6 0

Muscle cells and nerve cell

grigory [225]3 years ago
5 0
Heart cells and nerve cells normally doesn’t divide
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Construct a three-step synthesis of trans-2-pentene from acetylene by dragging the appropriate formulas into the bins. Note that
lozanna [386]

Answer:

A. Production of higher order terminal alkyne on reaction with sodium acetylides with haloalkane.

B. It includes the further alkylation of terminal alkynes to higher order nonterminal alkynes and

C. The production of trans-pent-2-ene by the use of the dissolving reduction method.

Explanation:

Concepts and reason

The basic idea of this case study is on the conversion of an alkyne to an alkene. Alkynes are unsaturated and can go through addition reactions. The essential chemical processes of alkynes involves the electrophilic addition reactions, nucleophilic addition reactions , reactions as a result of acetylenic hydrogen, polymerisation, isomerization and oxidation reactions.

Fundamentals

The conversion of an alkyne to alkene involves two basic processes which as to do with the production of higher alkynes from lower alkynes with the next phase involving the dissolved metal reduction of the higher order alkyne so as to form an alkene.

Conversion of acetylene (ethyne) to one higher order alkyne as shown in the first attached image.

Terminal alkynes combine with sodamide to produce acetylides that reacts with the haloalkanes (In this case, we using methyl bromide) to form higher order alkynes.

The reaction is as well represented in the second attached image.

Alkylation of terminal alkyne leads to the production of higher nonterminal alkyne (which is propyne) that is converted to higher order nonterminal Pent-2-yne.

The reaction is shown in the third attached image.

The entire or total hydrogenation of alkynes produces a corresponding alkane by passing hydrogen in the presence of metal catalysts. Partial hydrogenation of alkynes could lead to the development of cis- or trans- alkenes which is reliant on the reagent employed.

The right reagents and products in the total reaction is duly represented in the fourth attached image.

The Synthesis of trans-pent-2-yne from ethyne involves basically a three-step synthesis which includes

A. Production of higher order terminal alkyne on reaction with sodium acetylides with haloalkane.

B. It includes the further alkylation of terminal alkynes to higher order nonterminal alkynes and

C. The production of trans-pent-2-ene by the use of the dissolving reduction method.

• The last attached image has the answers being put in the adequate bin.

5 0
3 years ago
Older sedimentary rocks are usually found above younger ones. True False
kipiarov [429]
True in most cases unless they erode then the younger ones will be on top
3 0
3 years ago
You notice that extended use of the microscope is giving you a headache. Your professor mentions that the headaches may be due t
saul85 [17]

Answer:

Explanation:

Decrease the amount of light using the iris diaphragm lever.

4 0
3 years ago
How do scientist use layers of rock to determine when the Great Oxidation event occured?
Oksanka [162]

Answer:

Using the concept of relative dating

Explanation:

Scientists use the concept of relative dating principles to determine when the Great Oxidation event occurred.

Relative dating is the process of placing ancient event in their proper time sequence based on the relationship between rock lithologies.

  • An event like the great oxidation will have significant chemical, biological and physical effect on the rock units.
  • Rocks that form during this period in time will have very unique chemical signatures.
  • Therefore, by studying these rocks, the age of the layer can be fixed when we compare it to the standard geological column.
8 0
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Which lab equipment tool would you use to measure approximately 50 ml of salt water? explain
schepotkina [342]

You would use a beaker because it measures liquids and solids by volume.

To get a more accurate measurement, you should weigh the liquids. That process of measurement would give you the greatest accuracy.

6 0
3 years ago
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