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Oksi-84 [34.3K]
3 years ago
12

Fragments of metal or rock which enter the Earth's atmosphere from space are called:

Biology
2 answers:
stich3 [128]3 years ago
6 0

meteoroid- hope this helped have a good day!!

Natasha2012 [34]3 years ago
3 0

Answer:

meteorites. i had the same one.

Explanation:

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Scientists believe that the first organisms that appeared on Earth were prokaryotic. Which of the following best represents what
tekilochka [14]
Prokaryote is a bacteria
5 0
3 years ago
Hello please help me need aanswer​
viva [34]

As per questions,

★ What to do before a volcanic eruption?

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• Run out of the house with limited supplies and go to higher altitude areas like in mountains.

• Take some essential pain reducer medicines.

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• Protect yourself from falling ash.

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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
Deb is studying the difference between 2 types of soil. She notices that her plants grow more when they have additional nitrogen
Dennis_Churaev [7]

The molecule, which the plant is most likely synthesizing using the extra nitrogen is PROTEIN.

Plants and animals do not have the capacity to use atmospheric nitrogen as nutrient. Atmospheric nitrogen has to be converted to forms that are usable by plants and animals before they can utilize it. Nitrogen fixing bacteria are the ones that are responsible for converting atmospheric nitrogen to the forms such as nitrate and ammonium, which can be used by plants. Animals get their own portion of nitrogen when they eat plants or other animals. Nitrate is the form of nitrogen that is mostly used by plants. Excess ammonium in plants are usually used directly to synthesize proteins. Nitrogen is a very important component of chlorophyll, which is essential for photosynthesis. Nitrogen is also found in the genetic materials of plants and it is needed for their growth and development.  Animals used nitrogen to synthesize proteins, nucleic acid and other biological compounds that contain nitrogen.

3 0
3 years ago
Name the form of polymers derived from petroleum
LUCKY_DIMON [66]
I think the polymers are the hydrocarbons.

If this helped please mark me as brainliest.
6 0
3 years ago
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