19. draw the nucleus of a cell and label the: a) double layered structure which encloses the nucleus. b) visible entangled mass of thread like structures. c) a darkly stained round structure inside the nucleus.

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat