<span>D. The amount
of oxygen consumed by respiratory organisms balanced the amount of
oxygen produced by plants undergoing photosynthesis.
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<span><span>There are a lot of created theories in which biologists engaged themselves to explain such phenomenon that occurred thousands of years ago, and experts say such study is hard to replicate, the start of prokaryote cells. Prokaryotes were said to be the first organisms that existed and were able to exhibit photosynthesis that produced oxygen that spread across the atmosphere. Hence, consider the Theory of Spontaneous formation of organic moleculeswhich suggests that the early earth had less to none oxygen. Thus, the atmosphere was abundant with the gases, CO2 and N2 with some other small amounts of H2, H2S, and CO. Hence, in Stanley Miller’s experiment when electrical sparks or “lightning” came in contact with these gases, the newly formed mixtures of CH4, NH3, and H2 were catalyzed. With these newly formed gases in interaction with H2O came the first synthesized some amino acids that compromised the earliest organic molecules which evolved to macromolecules, to be organelles of a cell. Which in the latter macromolecules are in today, maybe have been before the early nucleic acids (able to replicate) or proteins of these early cells.</span>
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Answer:
D. Bonds between the strands are relatively weak hydrogen bonds, whereas bonds within the strands are relatively strong covalent bonds
Explanation:
According to Watson and Crick hypothesis on the structure of the deoxyribo nucleic acid, the two double helix strands of the DNA are weakly associated with each other by hydrogen bond. Within the strands, the nucleotide bases are held together by covalent bonds.
<em>The weak hydrogen bond ensures that the two strands are easily separated by the relevant enzyme during the process of replication or transcription. The relatively stronger covalent bond ensures that the nucleotide chains are not broken during the separation of the two strands.</em>
The correct option is D.
The cell membrane allows this to be true
Answer:
<h3>thank you</h3>
Explanation:
<h2>thanks</h2><h2>is this physics</h2><h2>i think its physics </h2>
Answer:
Research has shown that sea otters are doing their part by indirectly reducing the carbon dioxide (CO2) concentration in the atmosphere. It starts with vast areas of kelp forests that, through photosynthesis, absorb atmospheric CO2 and release oxygen into the air.
Explanation:
I hope this helps!