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Likurg_2 [28]
3 years ago
8

"What are the bacteria living in the ocean that do the nitrogen fixation, and were the first photosynthesizers on Earth providin

g the early oxygen found in the atmosphere around 2 billion years ago
Biology
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

Cyanobacteria

Explanation:

Cyanobacteria were the first photosynthetic autotrophs that used water molecules as the source of electrons. Cyanobacteria were the first autotrophs that performed oxygenic photosynthesis and carried out the splitting of water.  

The process of splitting water released oxygen as a gas (O2) which was released in the atmosphere of the earth as a by-product. This led to the accumulation of oxygen in the atmosphere. Some cyanobacteria can fix nitrogen and have specialized cells called heterocyst which serve as the site for nitrogen fixation.  

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In terms of environmental economics, the only factions that disagree with each other are environmentalists and economists. True
MatroZZZ [7]

The correct answer is FALSE.

It is false that the only factions which disagree with each other is economists and environmentalists.

Economists are referred to as practitioners which are found in the social science and their work is to discipline economics.

A person can develop, study and apply some concepts and theories from economic.

Environmentalists are termed as supporters who supports the movement of the environment.

There is a ethical movement of the movement or political which works to protect and improve quality of environment which is natural.

Environmentalist believes in environmentalism philosophy.

3 0
3 years ago
Read 2 more answers
What are nucleic acids made of?
LekaFEV [45]

Answer:

Explanation:

nucleic acid is a polymeric macromolecule made up of repeated units of monomeric 'nucleotides' composed of a nitrogenous heterocyclic base which is either a purine or a pyrimidine, a pentose (five carbon) sugar (either ribose or 2′-deoxyribose), and one to three phosphate groups.

4 0
3 years ago
Medical professionals are concerned with the increase in the number of bacterial species that are resistant to antibiotics. Once
valentina_108 [34]

Answer:

Resistance bacteria survive in greater numbers and pass the trait to their offspring

Explanation:

Antibiotics are chemicals which are used in the treatment of bacterial infections. The bacteria sometimes have some form of immunity or resistance to a particular antibiotic due to a host of underlying factors.

Once resistance appears in a bacterial population, it spreads rapidly. The trait of immunity or resistance to such antibiotic is then passed as a trait from one generation to another.

6 0
2 years ago
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In second marriages, couples are older and tend to be _________.
stealth61 [152]

Answer:

correct option is a.  more realistic

Explanation:

we know that marriage is legally relationship between a husband and a wife

and some for of marriage are

1 Arranged marriage

2 Civil marriage

3 Common law marriage

4 Boston marriage

5 Berdache marriage

and in second marriage

age and experience will be more

so as they age, they have gained experience from their past life

so we can say that in second marriages old couples tend to be more realistic

so correct option is a.  more realistic

7 0
2 years ago
A diagram explaining the cause of the seasons shows the Earth in its orbit around the sun. What is the main factor in how the ch
kati45 [8]
The awnser would be D the tilt on the earth on its axis
3 0
3 years ago
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