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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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Answer:

B. Fungicides to treat affected crops and planting rust-resistant varieties

Explanation:

Leaf rust is a disease caused by the fungus <em>Puccinia triticina</em> which affects leaves, stems and grains in wheat and related cereals (i.e., barley and rye). This disease is known to affect crops in moist conditions. Leaf rust disease is spread through fungi spores from infected wheat plants to healthy plants. Recently, leaf rust-resistant varieties have been developed by crop improvement programs aimed at introducing leaf rust-resistant (lr) genes involved in resistance against this important crop disease. Moreover, there are different types of fungicides (e.g., Prothioconazole and Tebuconazole) used for chemical control of this disease.

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3 years ago
What was the purpose of Mendel's experiments with dihybrid crosses?
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Answer:

B. to determine if one trait could affect the inheritance of another trait

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4 0
2 years ago
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Marina CMI [18]
Please Mark Brainliest. And put these in your own words cuz I got these off goo-glue
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From what i am looking at they are classified as organic or inorganic gems
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