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stich3 [128]
3 years ago
8

When did the first life appear?(how many years ago?)​

Biology
2 answers:
Veronika [31]3 years ago
8 0
Alc alc no se pero bendición carnal
Airida [17]3 years ago
4 0
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
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Anvisha [2.4K]

Answer:

B

Explanation:

Lowering gas price's will only make the community use more fossil fuels

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3 years ago
The migration of leukocytes across the endothelial lining of capillary walls, by squeezing between adjacent endothelial cells, i
Mademuasel [1]

Answer:

diapedesis

Explanation:

Leukocytes can come out of the bloodstream and the process of their emigration is called diapedesis. In diapedesis, leukocytes roll along the endothelium. These cells stick to and then squeeze between endothelial cells. Specific adhesion molecules assist the leukocytes in sticking to the endothelium. For example, selectins of endothelial cells stick to carbohydrates on the surface of neutrophils. The integrins of neutrophils stick them to the endothelium and assist in diapedesis.

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4 years ago
Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest electronegativity first)?
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O N C H

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Oxygen has more valence electrons present in its outermost shell which is why it is the most electrovalent.

Nitrogen follows suit too while the remaining aren’t electronegative but electropositive

7 0
3 years ago
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V125BC [204]

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False

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Soil with least porosity

Thus, the correct answer is 'Clay soil. '

3 0
3 years ago
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