What process might have caused the first cell to spontaneously generate over a long period of time?

What process might have caused the first cell to spontaneously generate over a long period of time?
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The theory of abiogenesis (aka biopoiesis) suggests that aminoacids, which form naturally under the proper chemical conditions,could have joined to form self-replicating chains such as RNA. Onceformed, these molecules could have evolved into more complex formssuch as DNA.
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What process might have caused the first cell to spontaneously generate over a long period of time?

Description : What process might have caused the first cell to spontaneously generate over a long period of time?

Last Answer : The theory of abiogenesis (aka biopoiesis) suggests that aminoacids, which form naturally under the proper chemical conditions,could have joined to form self-replicating chains such as RNA. Onceformed, these molecules could have evolved into more complex formssuch as DNA.

Why does algae seem to have the ability to spontaneously generate?

Description : Why does algae seem to have the ability to spontaneously generate?

Last Answer : answer:Continue your experiment. Next time use the filtered water, UV sterilized in a sealed (and sterilized) tank with pure oxygen, nitrogen, carbon dioxide or other pure gas (or no gas at all, if ... in my tap water that prevents the algae formation, but I hadn't wondered about that until now.

A persistent oroantral fistula for a 12 weeks period following the extraction of a maxillary first permanent molar is best treated by, a. Further review and reassurance since it will most probably heal spontaneously. b.Antibiotic therapy and nasal decongestants. c. Curettage and dressing of the defect. d. Excision of the fistula and surgical closure. e. Maxillary antral wash out and nasal antrostomy.

Description : A persistent oroantral fistula for a 12 weeks period following the extraction of a maxillary first permanent molar is best treated by, a. Further review and reassurance since it will most ... Excision of the fistula and surgical closure. e. Maxillary antral wash out and nasal antrostomy.

Last Answer : d. Excision of the fistula and surgical closure.

A persistent oroantral fistula for a 12 weeks period following the extraction of a maxillary first permanent molar is best treated by,** A. Further review and reassurance since it will most probably heal spontaneously B. Antibiotic therapy and nasal decongestants C. Curettage and dressing of the defect D. Excision of the fistula and surgical closure E. Maxillary antral wash out and nasal antrostomy.

Description : A persistent oroantral fistula for a 12 weeks period following the extraction of a maxillary first permanent molar is best treated by,** A. Further review and reassurance since it will most ... . Excision of the fistula and surgical closure E. Maxillary antral wash out and nasal antrostomy.

Last Answer : D. Excision of the fistula and surgical closure

In which process, a nucleus spontaneously breaks down by emitting radiation? -Do You Know?

Description : In which process, a nucleus spontaneously breaks down by emitting radiation? -Do You Know?

Last Answer : answer:

In which process, a nucleus spontaneously breaks down by emitting radiation?

Description : In which process, a nucleus spontaneously breaks down by emitting radiation?

Last Answer : Radioactive decay

Tissues are constructed from many distinct cell types that perform different functions in response to signals from each other and the extracellular matrix. During tissue development and tissue regeneration, stem cells serve as a reservoir of undifferentiated cells that have the capacity to mature into different cell types. What is the name of the process that stem cells undergo when they are required to generate a particular type of cell?

Description : Tissues are constructed from many distinct cell types that perform different functions in response to signals from each other and the extracellular matrix. During tissue development and tissue regeneration, ... that stem cells undergo when they are required to generate a particular type of cell?

Last Answer : Asymmetric cell division. After asymmetric division, each of the two resulting daughter cells has a unique life course. For example, one daughter cell may differentiate into a specific cell type ( ... cell), whereas the other daughter cell may remain a stem cell with unlimited proliferative ability.

What are the problems caused by the non-biodegradable wastes that we generate? -Biology

Description : What are the problems caused by the non-biodegradable wastes that we generate? -Biology

Last Answer : (i) Non-biodegradable wastes persist in the environment for a long time and cause greater harm to the various members of the ecosystem by causing biological magnification. (ii) Non-biodegradable ... the soil chemistry. in turn affects the fertility of soil and subsequently reduces the crop yield.

What are the problems caused by the non-biodegradable wastes that we generate ? -Biology

Description : What are the problems caused by the non-biodegradable wastes that we generate ? -Biology

Last Answer : The problems caused by the non-biodegradable wastes are : If the quantity of non-biodegradable matter increases in the nature then bio-magnification of poisonous chemicals in our body ... for new organisms. The increasing quantity of non-biodegradable waste will cause imbalance of ecosystem.

Observe the following table and write the HTML code to generate it: Period 1 Period 2 -Technology

Description : Observe the following table and write the HTML code to generate it: Period 1 Period 2 -Technology

Last Answer : The HTML code isPeriodlPeriod2 MathScienceEnglishSST Science< /td >SST

Can paper towels soaked in canola oil spontaneously combust?

Description : Can paper towels soaked in canola oil spontaneously combust?

Last Answer : First of all, canola oil has a fairly high smoke point, 400 degrees F. And canola oil is not volatile; the oil doesn't give off a lot of gasses at normal atmospheric temperatures. As a ... because anything in the trash might catch an errant flame/lit grease splatter and cause the trash to light.

What is the reason for losing ability to respond spontaneously?

Description : What is the reason for losing ability to respond spontaneously?

Last Answer : I will think about this and get back to you later.

Why does the etheric body awaken spontaneously suddenly?

Description : Why does the etheric body awaken spontaneously suddenly?

Last Answer : answer:As one evolves their consciousness, they become aware of spiritual dimensions never known before. While this new experience attracts one's attention, it is as important as noting a mile marker ... 's self will create eddies in this energy that becomes a source for suffering from illusions.

Do you feel smartphones make it more difficult to "mix" or spontaneously interact with semi-strangers in semi-public places?

Description : Do you feel smartphones make it more difficult to "mix" or spontaneously interact with semi-strangers in semi-public places?

Last Answer : I don’t think they make it more difficult to mix, but I do think they make it easier, by providing an “out,” not to mix.

Does anyone here spontaneously orgasm upon entering cold water?

Description : Does anyone here spontaneously orgasm upon entering cold water?

Last Answer : No. Lurve the question!

When I put my PC (running Windows XP) into hibernate mode at night, I find that it spontaneously awakens by the morning.

Description : When I put my PC (running Windows XP) into hibernate mode at night, I find that it spontaneously awakens by the morning.

Last Answer : That happens to me sometimes too. It puzzled the hell out of me until I noticed the cat hairs on the keyboard.

Is it true that you spontaneously empty your bowels right before or right after dying?

Description : Is it true that you spontaneously empty your bowels right before or right after dying?

Last Answer : answer:It’s a maybe. From HeartsAwayHospice:http://www.heartswayhospice.org/as_death_approaches.htm “The person may lose bladder and/or bowel control as muscles in that area begin to relax.”

Spontaneously click on the phone

Description : Hello, my sencor p5700 phone always works for a while and after a while it starts to click everywhere, I want to ask if the fault can be eliminated. Thank you for answer

Last Answer : Need Answer

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter

Description : Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter

Last Answer : Which one of the following experiments suggests that simplest living organisms could not have ... . Microbes appeared from unsterilized organic matter

The enthalpy change for a given reaction at `298 K` is `-x cal mol^(-1)`. If the reaction occurs spontaneously at `298 K`, the entropy change at that

Description : The enthalpy change for a given reaction at `298 K` is `-x cal mol^(-1)`. If the reaction occurs spontaneously at `298 K`, the entropy change at that

Last Answer : The enthalpy change for a given reaction at `298 K` is `-x cal mol^(-1)`. If the reaction occurs ... (-1)` C. Cannot be negative D. Cannot be positive

If `Delta H gt 0` and `Delta S gt 0`, the reaction proceeds spontaneously when :-

Description : If `Delta H gt 0` and `Delta S gt 0`, the reaction proceeds spontaneously when :-

Last Answer : If `Delta H gt 0` and `Delta S gt 0`, the reaction proceeds spontaneously when :- A. `Delta H gt 0` B. ... Delta S` C. `Delta H = T Delta S` D. None

Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be

Description : Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be

Last Answer : Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be A. 3 Joule B. 9 Joule C. Zero D. Infinite

Which of the following has maximum thermodynamic spontaneously at `400^(@)C`?

Description : Which of the following has maximum thermodynamic spontaneously at `400^(@)C`?

Last Answer : Which of the following has maximum thermodynamic spontaneously at `400^(@)C`? A. `C+O_(2) to CO_(2)` B. ` ... `2CO+O_(2) to 2CO_(2)` D. all have same

What determines new petal colors that spontaneously appear in a population of wildflowers?

Description : What determines new petal colors that spontaneously appear in a population of wildflowers?

Last Answer : What is the answer ?

What chemical reaction is toxic hydrogen peroxide will spontaneously break down into water and oxygen?

Description : What chemical reaction is toxic hydrogen peroxide will spontaneously break down into water and oxygen?

Last Answer : The chemical reaction is:2 H2O2 = 2 H2O + O2

If the nucleus of a radium-226 atom is unstable what causes the nucleus to spontaneously decay?

Description : If the nucleus of a radium-226 atom is unstable what causes the nucleus to spontaneously decay?

Last Answer : Instability is due to a certain ratio between neutrons and protons in the atomic nucleus.

Conversion of the linear tetrapyrrole hydroxymethylbilane to uroporphyrinogen III (A) Occurs spontaneously (B) Catalysed by uroporphyrinogen I synthase (C) Catalysed by uroporphyrinogen III cosynthase (D) Catalysed by combined action of uroporphyrinogen I synthase and uroporphyrinogen III cosynthase

Description : Conversion of the linear tetrapyrrole hydroxymethylbilane to uroporphyrinogen III (A) Occurs spontaneously (B) Catalysed by uroporphyrinogen I synthase (C) Catalysed by uroporphyrinogen III cosynthase (D) Catalysed by combined action of uroporphyrinogen I synthase and uroporphyrinogen III cosynthase

Last Answer : Answer : D

In the glycolytic pathway, enolpyruvate is converted to ketopyruvate by (A) Pyruvate kinase (B) Phosphoenolpyruvate (C) Pyruvate dehydrogenase (D) Spontaneously

Description : In the glycolytic pathway, enolpyruvate is converted to ketopyruvate by (A) Pyruvate kinase (B) Phosphoenolpyruvate (C) Pyruvate dehydrogenase (D) Spontaneously

Last Answer : Answer : D

Retinal is converted into retinoic acid in the presence of (A) Retinal oxidase (B) Retinal carboxylase (C) Retinene reductase(D) Spontaneously

Description : Retinal is converted into retinoic acid in the presence of (A) Retinal oxidase (B) Retinal carboxylase (C) Retinene reductase(D) Spontaneously

Last Answer : Answer : D

’Drying oil’, oxidized spontaneously by atmospheric oxygen at ordinary temperature and forms a hard water proof material is (A) Coconut oil (B) Peanut oil (C) Rape seed oil (D) Linseed oil

Description : ’Drying oil’, oxidized spontaneously by atmospheric oxygen at ordinary temperature and forms a hard water proof material is (A) Coconut oil (B) Peanut oil (C) Rape seed oil (D) Linseed oil

Last Answer : Answer : D

Chlorine atom and chloride ions - (1) Have an equal number of protons (2) Have an equal number of electrons (3) Unequal number neutrons (4) reacts spontaneously with water

Description : Chlorine atom and chloride ions - (1) Have an equal number of protons (2) Have an equal number of electrons (3) Unequal number neutrons (4) reacts spontaneously with water

Last Answer : (1) Have an equal number of protons

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter? (a) Larvae could appear in decaying organic matter. (b) Microbes did not appear in stored meat. (c) Microbes appeared from unsterilised organic matter. (d) Meat was not spoiled, when heated and kept sealed in a vessel.

Description : Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter? (a) Larvae could appear in decaying organic matter. (b) Microbes did not ... matter. (d) Meat was not spoiled, when heated and kept sealed in a vessel.

Last Answer : (d) Meat was not spoiled, when heated and kept

Entropy of the system decreases, when (A) Snow melts into water (B) A gas expands spontaneously from high pressure to low pressure (C) Water is converted into ice (D) Both (B) & (C)

Description : Entropy of the system decreases, when (A) Snow melts into water (B) A gas expands spontaneously from high pressure to low pressure (C) Water is converted into ice (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is (A) 4 J (B) ∞ (C) 0 (D) 8 J

Description : 4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is (A) 4 J (B) ∞ (C) 0 (D) 8 J

Last Answer : (C) 0

A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is (A) Zero (B) Positive (C) Negative (D) None of these

Description : A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is (A) Zero (B) Positive (C) Negative (D) None of these

Last Answer : (C) Negative

Burning of Gasoline initially requires heat before it burns spontaneously. Which of the following does not give a good explanation of this phenomenon?  a. the initial heat rises the enthalpy of the reactant  b. the initial heat lowers the activation of energy of the reactants  c. the enthalpy of reactants is lower than the enthalpy of products.  d. The enthalpy of the product is lower than the enthalpy of the reactant

Description : Burning of Gasoline initially requires heat before it burns spontaneously. Which of the following does not give a good explanation of this phenomenon?  a. the initial heat rises the enthalpy of the reactant ... of products.  d. The enthalpy of the product is lower than the enthalpy of the reactant

Last Answer : the enthalpy of reactants is lower than the enthalpy of products.

In maxilla fracture, if intra cranial pressure increases:** A. It is normal B. Typically associated with tachycardia C. Associated with blood pressure D. Usually subsides spontaneously E. Typically associated with constricted and un-reactive pupil

Description : In maxilla fracture, if intra cranial pressure increases:** A. It is normal B. Typically associated with tachycardia C. Associated with blood pressure D. Usually subsides spontaneously E. Typically associated with constricted and un-reactive pupil

Last Answer : C. Associated with blood pressure

____________ refers to the network of personal and social relations that is developed spontaneously between people associated with each other. (a) Formal organization ; (b) Informal organization ; (c) Business organization (d) Government organization

Description : ____________ refers to the network of personal and social relations that is developed spontaneously between people associated with each other. (a) Formal organization ; (b) Informal organization ; (c) Business organization (d) Government organization

Last Answer : (b) Informal organization ;

Which one of the following takes place during a nuclear fusion? (1) a heavy nucleus bombarded by neutrons breaks up (2) a heavy nucleus breaks up spontaneously (3) two light nuclei combine to form a heavy nucleus (4) a light nucleus breaks up spontaneously

Description : Which one of the following takes place during a nuclear fusion? (1) a heavy nucleus bombarded by neutrons breaks up (2) a heavy nucleus breaks up spontaneously (3) two light nuclei combine to form a heavy nucleus (4) a light nucleus breaks up spontaneously

Last Answer : two light nuclei combine to form a heavy nucleus

The first step in the Monte Carlo simulation process is to _____. a) generate random numbers b) set up cumulative probability distributions c) establish random number intervals d) set up probability distributions

Description : The first step in the Monte Carlo simulation process is to _____. a) generate random numbers b) set up cumulative probability distributions c) establish random number intervals d) set up probability distributions

Last Answer : d) set up probability distributions

What energy does an electric cell use to generate electricity ?

Description : What energy does an electric cell use to generate electricity ?

Last Answer : Electric cells generate electricity using chemical energy.

What is the reaction of a fuel cell to generate electricity ?

Description : What is the reaction of a fuel cell to generate electricity ?

Last Answer : Answer : Electricity is generated from fuel by the redox reaction that takes place between the two electrodes of the fuel cell.

Photodiodes used as fiber optic directors are a. Unbiased to generate a voltage same as a solar cell b. Forward bias c. Reversed bias d. Thermoelectrically cooled

Description : Photodiodes used as fiber optic directors are a. Unbiased to generate a voltage same as a solar cell b. Forward bias c. Reversed bias d. Thermoelectrically cooled

Last Answer : c. Reversed bias

Photodiodes used as fiber optic directors are ∙ a. Unbiased to generate a voltage same as a solar cell ∙ b. Forward bias ∙ c. Reversed bias ∙ d. Thermoelectrically cooled

Description : Photodiodes used as fiber optic directors are ∙ a. Unbiased to generate a voltage same as a solar cell ∙ b. Forward bias ∙ c. Reversed bias ∙ d. Thermoelectrically cooled

Last Answer : ∙ c. Reversed bias

Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive nitro radical C. It is rapidly inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity

Description : Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive ... inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity

Last Answer : B. Only anaerobes reduce it to generate the reactive nitro radical

Mitochondria can be considered the ____________of the cell because they generate an enormous amount of cellular adenosine triphosphate (ATP) to fuel the cell.

Description : Mitochondria can be considered the ____________of the cell because they generate an enormous amount of cellular adenosine triphosphate (ATP) to fuel the cell.

Last Answer : “Power plant” or “Power house”

Liquid fuels can be used to generate electricity in a variety of ways. Which of the following technologies converts liquid fuel directly to electricity without a combustion step? w) turbine x) battery y) fuel cell z) Stirling engine

Description : Liquid fuels can be used to generate electricity in a variety of ways. Which of the following technologies converts liquid fuel directly to electricity without a combustion step? w) turbine x) battery y) fuel cell z) Stirling engine

Last Answer : ANSWER: Y -- FUEL CELL  

A use computer to automatically generate process plans is? a.Lower-level strategies b.Intermediate strategies c.Higher-level strategies d.Morden-level strategies

Description : A use computer to automatically generate process plans is? a.Lower-level strategies b.Intermediate strategies c.Higher-level strategies d.Morden-level strategies

Last Answer : c.Higher-level strategies

Laser beams can generate three dimensional images of objects in a process called a) polygraphy b) telegraphy c) holography d) autography

Description : Laser beams can generate three dimensional images of objects in a process called a) polygraphy b) telegraphy c) holography d) autography

Last Answer : c) holography

Is there a website that will generate a single-line chart, graphing the performance of a collection of stocks over time?

Description : Is there a website that will generate a single-line chart, graphing the performance of a collection of stocks over time?

Last Answer : That would just the sum value of 1 share of each stock plotted versus time. You could normalize it to the index value' at a particular time if you wished. I need to think on whether ... would do that for you. Maybe Marketwatch with a free registration and Portfolio Personal Index Sferik #1. lol