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3 years ago

Cual es la diferencia entre cigoto; embrión y feto

Biology

1 answer:

astra-53 [7]3 years ago

8 0

Answer:

in spanish-Los términos embrión y feto se refieren al bebé en desarrollo dentro del útero de la madre. ... Un embrión se denomina feto a partir de la undécima semana de embarazo, que es la novena semana de desarrollo después de la fertilización del óvulo. Un cigoto es un organismo unicelular resultante de un óvulo fertilizado.

Explanation:

in english- The terms embryo and fetus both refer to the developing baby inside the mother's womb (uterus). ... An embryo is termed a fetus beginning in the 11th week of pregnancy, which is the 9th week of development after fertilization of the egg. A zygote is a single-celled organism resulting from a fertilized egg.

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Even a jumperless motherboard is likely to have one jumper. which jumper is it

vladimir1956 [14]

The answer is : A bios or cmos jumper. The jumper acts as a switch by closing (or opening) an electrical circuit. Clearing the CMOS on your motherboard will reset your BIOS settings to their factory defaults. After clearing the CMOS, you'll need to access the BIOS setup utility and reconfigure your hardware settings.

5 0

3 years ago

At the official announcement of completion of the draft human genome (choose all that apply)

In-s [12.5K]

Answer:

(B) Two alternative strategies were used to complete the genome - top down and bottom up
(C) The public project used a mapping strategy to limit the total sequencing required
(D) The Celera group, led by Craig Venter, used a shot gun sequencing strategy

Explanation:

As the project was unable to sequence all the DNA that was found in the human cells, the first draft was made in June and complete in the end referred to as a working draft and made on the basis of the final sequencing and mapping of the human genome.

The draft included the alternative strategies for the completion of the bottom up and top up of the genome code and has a mapping strategy that limited the total sequencing needs.

7 0

3 years ago

You decide to repeat the Meselson-Stahl experiment, except this time you plan to grow the cells on light 14N medium for many gen

Effectus [21]

Answer:

One band of light density and one band of heavy density.

Explanation:

According to conservative model of replication, the original strands do not separate from each other during replication. Hence, after replication the old strands are together and the new strands are together.

Here, cells were grown in 14N medium first so 14N was used for DNA replication and all DNA molecules had 14N. When the cells were transferred to 15N medium, only 15N was available for replication process. New DNA molecules would be synthesised using 15N (15N15N) and old DNA molecules have 14N (14N14N). Hence, in density gradient one band will be of light density (14N14N) and one band will be of heavy density (15N15N).

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3 years ago

using the process of bacterial transformtion, a student reseacher inserted a plasmid containing a gene for antibiotic resistance

Elena-2011 [213]

Transfer of newly created plasmids to e coli. The bacteria that contains a plasmid with antibiotic resistance will grow in the presence of antibiotic concludes that the insertion was successful.

<h3>Explanation:</h3>

The plasmid DNA that contains the foreign DNA when integrated with the competent bacteria which is e coli and heated, plasmid DNA will be entering into the bacteria by means of some smaller pores that are created in the membranes of the cell.

The plasmid DNA will be copied many times with the help of the replicating mechanism of DNA of the bacteria. Bacteria will grow on a nutrient rich food called agar after the transformation process. Those bacteria that contains a plasmid containing antibiotic resistance only grow in the antibiotic presence. Transformed bacteria will then grow in larger quantity.

4 0

3 years ago

Match each step of the scientific method with its description.

Shtirlitz [24]

Answer:

I have put the question like this ;

Tiles

1. construct a hypothesis

2. communicate the results

3. test the hypothesis

4. make observations

5. analyze the results and

make a conclusion

6. ask questions

Pairs

A. Bread, when kept in the open for a

long time, shows the presence of mold.

B. What causes mold growth on bread?

C. Changes in temperature may affect

the growth of mold on bread.

D. Keep the bread in different locations,

changing the temperature at each location.

E. Increased temperature leads to the

growth of mold.

F. Make a presentation of the data, and

explain it to the class.

Explanation:

<h3>ANSWERS :</h3>

1- C ( this is an assumption; a hypothesis is always based on an assumption.

2- F ( this states to share the results with other classmates).

3- D (this is a description of an experiment you could conduct; you test a hypothesis (usually) by conducting an experiment.

4- A (this is something you could observe during the experiment, therefore it is an observation).

5- E (this sentence is a conclusion).

6- B (This is an actual question)

4 0

4 years ago