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never [62]
3 years ago
5

Can you explain how more life-forms were able to create because of cyanobacteria​ PLEASE HELP

Biology
1 answer:
Ainat [17]3 years ago
8 0

The cyanobacteria changed the composition of the earth’s atmosphere by evolving oxygen in what is referred to as the Great Oxygenation Event. This also allowed the ozone to be formed and block off most of the UV rays that are destructive to genetic material. Life was, therefore, also able to exist on land other than in water.

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Determine which of the three
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Answer: North America

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The function of the nervous system is to A) help protect the body from disease. B) bring oxygen, nutrients and hormones to cells
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If I'm not mistaken it would be D
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Regions of biomes that are an inconsistent mixture of fresh and salt water include ______. Select one: a. ponds b. lakes c. stre
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5 0
3 years ago
¿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.

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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.

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3 years ago
Soil nutrients are important to photosynthesis because they_____.
VLD [36.1K]

Soil nutrients are important to photosynthesis because they <u>help with chlorophyll </u><u>formation</u><u>.</u>

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2 years ago
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