A teacher makes the analogy that stem cell research did for medicine what the Internet did for communication. What is meant by this analogy?

Answers

Answer 1

Answer: Internet has changed the nature of communication, making one kind of communication faster, more efficient and more universal (international). However, people find some aspects of Internet as a communication medium controversial, as they say that it stops people from interaction face to face.

Similarly,
Stem cell research has changed the nature of medicine, making one kind of research in medicine faster, more efficient and more powerfull. However, people find some aspects of stem cell research controversial, as they say that involves experimenting with human embryos.

If I were to summarize, I would say that both stem cell research and Internet introduced a step in a new direction, one that is very prolific and will likely develop further.

Answer 2

Answer:

Answer:

B. Stem cell research led to a huge leap in medical science.

Explanation:

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Before the introduction of the yellow crazy ant to Christmas Island, land crabs ate many plant seedlings on the forest, and the forest floor stayed relatively clear of plants. As the crab population declined, plant seedlings flourished. The forest floor became covered with plants. Which statement best describes what occurred on the forest floor? (Points : 1)Primary succession occurred because the ant was a new species that changed the ecosystem.

Secondary succession occurred because the organisms on the forest floor changed.

Climax vegetation occurred because the seedlings finally had a chance to grow.

Primary succession occurred because more plant life in the ecosystem was healthier.

Answers

I would say Climax Vegetation since the ants pretty much died off the plant had much time to grow

A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid side chains in an enzyme’s active site. Based on the model, which of the following statements best explains an enzyme’s specificity for a particular substrate molecule?a. A hydrophilic molecule interacts with nonpolar side chains in the enzyme’s active site.b. A hydrophobic molecule interacts with polar side chains in the enzyme’s active site.c. A molecule with positive charges interacts with positively charged side chains in the enzyme’s active site.d. A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Answers

Answer:

Option- D

A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Explanation:

A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid side chains in an enzyme’s active site.Based on the model, the following statements best explains an enzyme’s specificity for a particular substrate molecule, which is "A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site."

Answer:

D. A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Explanation:

Because opposite charges attract, a molecule with negative charges will form favorable interactions with positively charged side chains in an enzyme’s active site. Based on the model, the favorable interactions helps explain the enzyme’s specificity for the molecule as a substrate.

I also got this question correct so I am sure.

Valence is the number of electrons an atom must gain or lose in order to _____ its outer energy level or have a stable octet in its outer shell.complete
lose
gain

Answers

The correct answer is complete.

Valence is the number of electrons an atom must gain or lose in order to complete its outer energy level or have a stable octet in its outer shell. In the first energy level it can have only 2, but later levels can have 8, that is, an octet.

Answer;

Complete

Valence is the number of electrons an atom must gain or lose in order to complete its outer energy level or have a stable octet in its outer shell.

Explanation;

-Valency is the number of electrons that an atom requires to gain or lose to form a complete configuration or an octet configuration.

-Atoms tend to lose or get electrons in order to achieve the electronic arrangement of atoms of the noble gases. An ion is an atom or group of atoms having an overall electrical charge. Atoms gain electrons to form cations (positively charged atom), while other lose to form anions (negatively charged atoms).

When a chromosome pair fails to separate correctly in meiotic division, what is it called?a. Chromosome deletions
b. Crossing-over
c. Nondisjunction
d. Trisomy

Answers

C. Nondisjunction.
Nondisjunction is the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during nuclear division. This can result in deformities in a new-born such as Down Syndrome, due to lack of chromosomes in the body.

Most tectonic plates have both oceanic and continental crust. How is oceanic crust different from continental crust

Answers

Tectonic plates are results of volcanic lava produces by an active volcanoes and the cause of its eruption is the activity of the earths movement in the mantle. So the different of the two is the oceanic crust is usually form in the ocean, this plates or crust are mostly younger that the continental crust and could be recycle, while the continental crust is usually old in age and contains land organism living and rich of mineral have been found

One difference between carbohydrates and lipids is thata. Lipids will dissolve in water but not carbohydrates.
b. Carbohydrates will dissolve in water but not lipids.
c. Carbohydrates contain hydrogen, carbon, and oxygen and lipids do not.
d. Lipids contain hydrogen, carbon, and oxygen and carbohydrates do not.

Answers

Answer:

B. Carbohydrates will dissolve in water but not lipids

Explanation:

Both carbohydrates and lipids have oxygen, carbon and hydrogen molecules in their compositions.

However, the difference is that carbohydrates are polar and lipids are nonpolar. Nonpolar substances can only be dissolved in nonpolar solvents and so they are insoluble in water (which is polar). Compounds with this feature are called hydrophobic.

Lots of differences, but here's one: Carbohydrates are more rapidly transformed by the body into energy than lipids are. As a result, carbohydrates have a more pronounced impact on insulin levels than lipids do.

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