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hjlf
3 years ago
10

What allowed the earth’s atmosphere to increase in oxygen concentration?

Biology
1 answer:
Sophie [7]3 years ago
3 0

Answer:The answer is tiny organisms known as cyanobacteria, or blue-green algae.

Explanation:

These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and oxygen increase. Additionally, some sources you could use that I used to answer this question was

https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere/

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What is a secure chemical landfill? A. a landfill in an area of nonporous bedrock B. a biological treatment plant for liquid was
natima [27]

The correct answer is option A, that is, a landfill in the region of nonporous bedrock.  

A permanent waste disposal facility where the wastes are put into the ground and covered with a layer of plastic, soil, or both is known a landfill. A secure chemical landfill refers to a landfill developed in the region of nonporous bedrock.

A secure chemical landfill is a prudently engineered depression in the ground or constructed on the top of the ground, signifying a football stadium into which wastes are dumped. The objective is to inhibit any water-related or hydraulic association between the surrounding environment and the wastes, mainly groundwater.  


6 0
2 years ago
What is the capital of U.S.?
lesantik [10]

Answer:

Washington d.c is the capital of the u.s

4 0
2 years ago
Why is the phloem in a leaf important to the roots of a plant apex?
Nana76 [90]

Answer:

The correct answer will be- phloem transports photsynthetic products to the roots

Explanation:

Phloem is the vascular tissue which specializes in transporting the solute molecules like sugar in the form of sucrose to in the plants.

The phloem connects the photosynthetic organ (Leaves)  to non-photosynthetic organs (stem and roots) of the plants by transporting the photosynthates or sucrose to various parts.

Since the roots also need the energy to perform metabolic functions so need the photosynthates to synthesize the energy molecule. They receive the photosynthates from the phloem.

Thus, phloem transports photosynthetic products to the roots is the correct answer.

5 0
3 years ago
Read 2 more answers
What is an infection?
Pie

Answer:

D

Explanation:

An infection is when something invades your body, therefore, you are infected with micro-organisms making it D.

3 0
2 years ago
About one hundred thousand years ago, very fluid lava started erupting slowly and gently from a place near a plate boundary. Wha
Mkey [24]

Answer:

Fluid lava (which is less viscous because it has less silica content) flows much further than viscous lava (that is high in silica content). Therefore, this types of lava forms shield volcanoes – low slopes and low height- because they flow over longer distances before they cool.  Viscous lava from composite volcanoes that are high in height and have  steep slopes.Explanation:

4 0
2 years ago
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