Atree is planted in a meadow.

after 20 years it has grown into a big tree, weighing 250kg more than when it was planted.

where do the extra 250 kg come from?

explain your answer as fully and scientifically as you can.

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.