The correct answer is D. temperature difference in the mantle I am an Online Middle Schooler and I got it right
Temperature variations in the fluid start convection currents. The lower mantle in the Earth's mantle heats up due to heat from the core, which causes it to rise. The substance falls back as it cools, causing the convection current. The correct option is D.
Explanation:
Temperature differences in the fluid's area are what cause a convection current to be activated and the flow of a fluid to begin. The Earth's mantle is where this is most noticeable.
The lower mantle's temperature rises in this situation as a result of heat from the core. The density of the mantle material drops as it warms, causing it to rise.
As it rises and moves away from the heat source, however, it cools down, gets denser, and sinks back.This movement of rising and sinking due to temperature differences creates the convection current.The correct option is D.
#SPJ11
B) qRNA
C) rRNA
D) tRNA
Answer:
(A). mRNA.
Explanation:
During protein synthesis, information present in DNA as triplet codons gets transferred to mRNA molecule, by the process of transcription. The mRNA than gets transported to the cytosol, where it associates with ribosomes.
Ribosomes are known as protein factories of the cells as they provide platform for translation. During translation, information present in mRNA is used to translate polypeptide chain or protein as each codon codes for a specific amino acid.
Thus, the correct answer is option (A).
B. hydrogen bonding; depletion
C. condensation synthesis; hydrolysis
D. polar synthesis; hydrolysis
E. condensation synthesis; anabolism