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3 years ago

Why are there more debates than answers when discussing stem-cell research?

Biology

2 answers:

WITCHER [35]3 years ago

7 0

Answer:

(These are sample awnsers so I don't recomend copy and paste)

Scientists do not fully understand how stem cells proliferate and differentiate.

There are ethical concerns debated when using embryonic stem cells for research.

Scientists do not know the signals used by stem cells and if they are similar when forming specialized cells; they are unable to grow specialized and unspecialized cells in the lab.

It is a newer technology with many questions left to answer.

algol [13]3 years ago

3 0

Answer:

Explanation:

bobabooey

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Frog larvae have A gills (B fins C both of these D neither of these

Eva8 [605]

We learned this and the answer is A

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4 years ago

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glucose is a product of photosynthesis. where do the carbon atoms of glucose produced during photosynthesis come from?

Tju [1.3M]

Answer:

Atmospheric carbon dioxide (from animals)

Explanation:

The carbon atoms in glucose come from the atmospheric carbon dioxide molecules that are taken in by plants for photosynthesis.

Hope this helps!

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2 years ago

Which is correct if it is not correct, correct it.

PtichkaEL [24]

membrane proteins are required for all membrane transport into and out of cells

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3 years ago

Describe how you would use the yeast-two-hybrid technique to find the proteins that interact with a liver-specific receptor prot

ollegr [7]

Answer:

Yeast-two-hybrid technique is one of the most important molecular technique that can be used to study the interactions at the molecular level. The interactions between the protein and DNA-protein interaction can be studied by this technique.

If the individual wants to study the liver liver-specific receptor protein then yeast-two-hybrid technique can be applied. The interested protein that can acts as prey and bait proteins must be covalently linked with the other third protein known as the reporter protein. Then the activity of the reporter protein is studied with the interactions of the prey and bait protein.

5 0

3 years ago

Can anybody say what phase each letter goes with? I am having a very hard time

ioda

Answer:

A is called Prophase

B is called Anaphase

C is called Metaphase

D is called Telophase

Explanation:

These can get confusing but I'll explain it for you.

The first stage of mitosis is Prophase.

In this stage the chromosomes become visible and the centrioles separate and move to opposite poles of the cell.

The second stage of mitosis is Metaphase.

In this stage the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere.

The third stage of mitosis is Anaphase.

In this stage the sister chromatids separate into individual chromosomes and are pulled apart.

The fourth and last stage of mitosis is Telophase.

During this stage the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.

The process that follows the last stage of mitosis is called Cytokinesis.

With two complete copies of the DNA now in two different regions of one cell, the cell membrane will pinch and divide the cytoplasm in half. The result is two individual cells that are identical to the original cell. Each of the two new cells have a complete copy of the DNA and contain all of the organelles that the original cell had.

Hopefully, this eases the problem for you and you understand it better.

Also, this image might help:

Let me know if you any other questions about this.

Good luck:)

4 0

4 years ago