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hjlf
3 years ago
13

In the biosphere, energy flows through

Biology
1 answer:
dezoksy [38]3 years ago
7 0

Answer: I think it's through tropical level

Explanation:

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Describes the structure of nucleic acids
dem82 [27]

The secondary structure is responsible for the shape that the nucleic acid assumes. The bases in the DNA are classified as purines and pyrimidines. ... A purine base always pairs with a pyrimidine base (guanine (G) pairs with cytosine (C) and adenine (A) pairs with thymine (T) or uracil (U)).

3 0
3 years ago
How is the environment divided
Sunny_sXe [5.5K]

Answer: This is true for all parts of the surface of the Earth including the land and the upper parts of the ocean. The four natural resources; soil/rock, air, water, sun; constitute the major components of the physical environment.

Explanation:

6 0
3 years ago
En los alérgicos, a partir del segundo contacto con el alérgeno cuando se produce la reacción alérgica. ¿Cómo podrías explicarlo
dem82 [27]

Answer:

La segunda exposición desencadena la fase de 'respuesta' asociada a la reacción alérgica  

Explanation:

La alergia se puede considerar como una respuesta desmedida del sistema inmune cuando un individuo entra en contacto con ciertas sustancias que son inocuas para la mayoría de la población, pero que en personas alérgicas desencadenan fuertes reacciones de hipersensibilidad. La alergia tiene dos fases conocidas como fase de sensibilización y fase de respuesta. La primera fase de sensibilización es donde el individuo entra en contacto con los 'antígenos' del alérgeno, lo cual provoca que el individuo genere anticuerpos IgE los cuales combaten al alérgeno (el sistema inmune considera que esta sustancia es potencialmente dañina), mediante la generación de anticuerpos de IgE que se unen a receptores de células del sistema inmune (eosinófilos, basófilos y mastocitos). La segunda fase de respuesta se produce cuando el individuo entra de nuevo en contacto con el alérgeno. Durante el segundo contacto, los antígenos del alérgeno interactúan con anticuerpos específicos de IgE que se encuentran sobre la superficie de células del sistema inmune, desencadenando la degranulación de estas células (mastocitos) y la consecuente liberación de mediadores químicos de la alergia tales como, por ejemplo, histamina, los cuales son responsable de los síntomas típicos de la alergia (tos, estornudos, picor, enrojecimiento de ojos, urticaria, inflamación, etc.).

4 0
2 years ago
You are going on a space trip. You fly in a shuttle from Earth to Mars. You leave Mars and shuttle over to Saturn. On
lukranit [14]

Answer:

Jupiter

Explanation:

I would say that because Jupiter already has a lot of mass on it and I would suspect that you would too.  But I am not sure if it is 100% right, so correct me if I am wrong! Have a nice day! :)

3 0
3 years ago
The natural extinction of a predator can negatively affect the
Burka [1]

Answer: A

Explanation:

With a decrease in predators there is no challenge for the prey and population growth can become uncontrollable

Hope this helps

8 0
3 years ago
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