Explain in a diary how the essential nutrients cycle through our ecosystem and how it affects you.

In ecosystem, plants are the producer which prepare their own food. This food is eaten by primary consumers such as deer and cow etc. These primary consumers are the food of secondary consumer such as lion and tiger etc. When they die, decomposers such as bacteria and viruses etc are feed on their body and releases nitrogenous materials which are used by the plants again to make their food.

These plants and some animals are eaten by humans for energy. If this cycle is disturbed, the whole ecosystem is badly affected including humans.

answer; ///i believe that the correct answer is (d); ///

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.