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Radda [10]
3 years ago
7

Elabora una hipótesis de: Los cometas habrían contribuido a la Tierra con moléculas orgánicas, como aminoácidos, hidrocarburos y

las cinco bases nitrogenadas que forman el ADN y el ARN
Biology
1 answer:
RUDIKE [14]3 years ago
5 0

Answer:

Hipótesis: la vida está distribuida por todo el universo debido al trasporte de moléculas orgánicas a través de cometas interestelares 

Explanation:

En ciencia, una hipótesis es una explicación posible de una pregunta sobre algún fenómeno específico del mundo natural, la cual es corroborada (o refutada) a través de la aplicación del método científico. A través de técnicas de espectrometría, las cuales son capaces de medir con exactitud los espectros de absorción y de emisión de la luz de determinadas sustancias químicas, los científicos recientemente han determinado inequívocamente que los cometas pueden transportan concentraciones significativas de materia orgánica, es decir, aminoácidos y bases nitrogenadas como las que forman los bloques de construcción del ADN y ARN. En consecuencia, este tipo de observación puede llevar a plantear diferentes preguntas relacionadas al origen de la vida tales como, por ejemplo: ¿ la vida se originó en la Tierra a partir de la combinación de materia orgánica de origen extraterrestre?, o bien ¿la vida se encuentra distribuida en todo el universo gracias a cometas interestelares?. La 'panspermia' es una hipótesis que propone la existencia de vida esparcida por todo el Universo. Esta hipótesis está basada en la existencia de microrganismos extremófilos como aquellos que se encuentran en condiciones extremas de temperaturas, planteando que dichas formas de vida habrían quedado atrapadas en cometas los cuales habrían sido expulsados ​​al espacio como consecuencia de colisiones entre planetas que albergan vida.

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Answer:

Explanation:

Whereas facilitated diffusion is a passive process and does not require energy. Active transport uses carrier proteins

8 0
2 years ago
Why the rainforest in Costa Rica is not rich with plants? Remember to use scientific language
Troyanec [42]

Answer:

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In addition to sustain the beef production,  trees were fell to for cattle ranching.This ultimately contributed to loss of the forest species.

Banana plantation is an  additional factor.Forest were cleared to cultivate banana, which affects forest population.

Explanation:

3 0
3 years ago
The EKG is hooked up, and Mr. M's trace looks very abnormal. His heart rate is low. The T wave, which indicates repolarization o
azamat

Answer:

This question lacks options, options are: Mr. M's cells are depolarizing too easily. Blocking Nat channels will make it harder for them to depolarize, bringing their sensitivity back to normal O Mr. M has too little K* leaving his cells, so we need to block the Nat channels so the Kt channels can stay open and his cells can repolarize properly. Mr. M has too little K* leaving his cells, so we need to block the Nat channels so the Na /K+ ATPase can move Kt out of the cell effectively O Blocking Na* channels cannot help- it will only make his cells fire less, and he already has a weak heartbeat. Mr. M's cells are not repolarizing properly. Blocking Nat channels will help them repolarize normally, bringing their resting potential back to normal.

The correct answer is ''Mr. M's cells are depolarizing too easily. Blocking Na+ channels will make it harder for them to depolarize, bringing their sensitivity back to normal.''

Explanation:

Calcium administration is an emerging treatment modality aimed at restoring the transmembrane electrical gradient of cardiac myocytes. It probably achieves this goal by reducing the resting membrane potential of cells. Calcium antagonizes the effect of hyperkalemia on cardiac conduction, that is, it antagonizes the effects of K on the heart. Its onset of action is immediate, in a few minutes. Calcium gluconate antagonizes the excitability of the cardiac membrane, that is, it decreases the excitability of the membrane and it does not affect serum levels, it is generally accepted that calcium should be administered when there are ECG changes associated with hyperkalemia.

6 0
2 years ago
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Answer:

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Explanation:

4 0
2 years ago
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mixer [17]

Answer:

C) Protein synthesis is the process through which cells read DNA and build the molecular components of new cells.

Explanation:

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4 0
3 years ago
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