Answer:
F
Explanation:
The blood disease Sickle-cell anemia is caused by a simple substitution mutation. In the mutation, a single nucleotide is replaced in the portion of DNA which codes for a unit of hemoglobin.
The Haber process converts nitrogen gas into ammonia<span> used in fertilizers. </span>Ammonia<span>is converted to nitrates by nitrifying </span>bacteria in the soil<span>. Plants absorb nitrates from the </span>soil<span> and use these to build up proteins. The plant may be eaten by an animal, and its biomass used to </span>produce<span> animal protein.</span>
Answer:
"Each carbon atom has only three covalent bonds instead of the required four.
"
Explanation:
In the covalent bond the chemical bonding takes place by distribution of electrons among the atoms. The electrons that has been paired are also termed as the bonding pairs, they are also very much constant and balanced of attractive and repulsive forces among atoms. This covalent bond helps in other unstable atom in getting stable, by archiving electron from other atoms which will help them in forming a complete electron shell.
Ide say c is the best option here but i wouldent bank on my answer.
D. living things as a reservoir
