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Leto [7]
3 years ago
15

Earth's early atmosphere was primarily composed of

Biology
1 answer:
Paul [167]3 years ago
5 0

Answer:

The correct answer is ''carbon dioxide, water vapor and nitrogen.''

Explanation:

About 4.5 billion years ago, Earth was a very geologically active planet. So many volcanic fumes formed the primitive atmosphere, which was mostly made up of water vapor, carbon dioxide, sulfur, and nitrogen. At this point, oxygen was barely present and the oceans did not yet exist. The primitive atmosphere is the one before the Precambrian, it was reductive, that is, it lacked free oxygen, and only had ammonia, methane and hydrogen, the high temperature of the atmosphere in its early stages facilitated the reaction of these gases to form organic compounds from which life may have emerged. UV rays passed, because ozone did not exist.

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1. A(n) blankis a stretch of dna consisting of an operator, a promoter, and genes for a related set of proteins, usually making
ohaa [14]

An operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.

operon is a functional unit of gene.

This cluster of gene transcribed together to give a messenger RNA which further give rises to protein.

operator in operon is the site where repressor binds.

promoter is where Mrna binds , where our genes are transcribed

structural genes, they code for the enzyme that are involved in this metabolic pathway.

Operons have an important role to play as they produce protein for the cell this serves them energy, the protein is produced only when energy is required.

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4 0
1 year ago
The ____________ (size/color) of crystals formed depends on the speed of evaporation.
serg [7]

The right answer is the size.

Crystallization is the operation that consists, of a solution (solvent + solute) or a molten solid, to form a crystallized solid. The solute crystallizes in general in a predefined geometrical form (cubic, face-centered cubic, etc.), including or not solvent molecules (eg pure NA2SO4 or [Na2SO4, 10H2O]). The form or chemical formula of the crystals may depend on the crystallization temperature.

There are two ways of crystallization: The dry way and the wet way (in solution)

In crystallization in solution: the solute is initially in the liquid phase in a solvent. It is crystallized (solidification ordered according to a regular structure) within the solution either by solvent evaporation, or by cooling the solution, or both.

3 0
3 years ago
Read 2 more answers
How can the ethiopian wolves prey be classified as.<br><br> Dont say endangered plz
TEA [102]

Given what we know about the diet of the Ethiopian wolves, we can confirm that their prey can be classified as rodents.

<h3>What are Ethiopian wolves?</h3>
  • The Ethiopian wolves are a canine native to Ethiopia.
  • They are carnivores and hunt in packs.
  • Despite their name, they more closely resemble foxes or jackals.
  • They feed on rodents such as rats and hares.

Therefore, given their diet based primarily on animals such as hares, giant mole rats, and grass rats, we can confirm that the prey of the Ethiopian wolves can be classified as rodents.

To learn more about Ethiopia visit:

brainly.com/question/1267380?referrer=searchResults

4 0
2 years ago
What is the advantage of having a folded inner membrane in the mitochondria
Aliun [14]

Okay so, the mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes. The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called the matrix. The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur.

Hope that helps (:

8 0
3 years ago
What is evapotranspiration?
11111nata11111 [884]
When water is transferred from land to atmosphere by evaporation from the soil and by transpiration plants.
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3 years ago
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