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Ne4ueva [31]
3 years ago
12

This is a process by which substances are transported across cell membranes by means of protein carrier molecules

Biology
1 answer:
8_murik_8 [283]3 years ago
6 0

i think the answers is Exocytosis

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¿Qué se puede agregar a un átomo para hacer que un electrón sin valencia en el átomo se convierta temporalmente en un electrón d
NNADVOKAT [17]

Energía.

Explicación:

Generalmente, los electrones giran continuamente en las capas de los átomos. Si estos electrones se encuentran en las capas más externas de un átomo, se denominan electrones de valencia.

Son necesarios para las reacciones químicas de un átomo en particular con otro, a través de sus pérdidas o compartidas.

En los átomos sin valencia, sus capas más externas no tienen electrones en sus capas más externas, tales átomos son estables.

Sin embargo, si se suministra cierta cantidad de energía a dicho átomo, el electrón gana energía y, por lo tanto, se excita.

Por lo tanto, se mueven de niveles de energía más bajos a niveles de energía más altos, y hacen que el átomo sin valencia se convierta en valencia temporalmente, a medida que se mueven hacia la capa más externa.

Answer:

Energy.

Explanation:

Generally, electrons revolves continuously in the shells of  atoms.if these electrons are located in the outer most shells of an atom,they are refereed to as the Valence electrons.

They are needed for chemical reactions of a particular atom with another,through their loses or sharing.

In Non -valence atoms their outermost shells do not have electrons at their outermost shells,such atoms are stable.

However, if  certain quantity of energy is supplied  to  such atom, the electron  gains energy and therefore becomes excited.

They therefore move from lower energy levels to higher energy levels,and makes the non- valence atom becomes valence temporarily, as they move into the outermost shell.

5 0
3 years ago
How are radioactive isotopes used to date rocks? ...?
Stolb23 [73]
Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
8 0
3 years ago
20 POINTS!! SELECT ALL CORRECT ANSWERS!!
stira [4]

Answer:

xecr tbyununybt y 7nbytvthhbbhd r f

4 0
3 years ago
Read 2 more answers
What happened on easter island and what should we learn from their mistake
Korolek [52]

Answer:

The used up all their resources too fast and weren't able to regrow them in time; they eventually basically killed each other off.

Explanation:

6 0
4 years ago
Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each
HACTEHA [7]
I don't know a lot about volcanos, but I can help you with the formatting
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