Answer:
Carbon based rings & chains form very large molecules because carbon can form up to 4 covalent bonds to form these rings and chains, and these bond with other rings and chains over and over. ... Lipids, proteins, carbohydrates, and nucleic acids are the 4 main types of carbon-based molecules in organisms.
Explanation:
<span>Many sexually active american adolescents fail to avoid pregnancy because they are not educated on contraceptive methods. </span>
Explanation:
The autonomic nervous system controls internal body processes such as the following:
Blood pressure
Heart and breathing rates
Body temperature
Digestion
Metabolism (thus affecting body weight)
The balance of water and electrolytes (such as sodium and calcium)
The production of body fluids (saliva, sweat, and tears)
Urination
Defecation
Sexual response
It is becuase those people came from different places and mated with others leading to a combination of dirrerent traits.
Answer:
The correct answer will be option-B
Explanation:
The process of transcription transcribes the sequence of the bases of genes present on DNA to mRNA which acts as a messenger molecule for the protein synthesis.
The process of transcription is mediated by the presence of enzymes which includes the main transcription enzyme called RNA polymerase. RNA polymerase attaches nucleotides to RNA strand.
The transcription process initiates in three stages: initiation, elongation and termination.
The initiation process begins when RNA polymerase binds to the promoter nucleotide sequence which is present at the start site or the upstream on DNA towards 5' end.
Thus, Option-B is the correct answer.
