Explain that transpiration involves the evaporation of water from the internal surfaces of leaves followed by diffusion of water vapour to the atmosphere
1 Answer State that some mineral ions and organic compounds can be transported within plants dissolved in water
1 Answer Explain mass flow in phloem sieve tubes down a hydrostatic pressure gradient from source to sink
1 Answer Describe the distribution of xylem and phloem in transverse sections of stems, roots and leaves of herbaceous dicotyledonous plants
1 Answer Relate the structure of xylem vessel elements, phloem sieve tube elements and companion cells to their functions
1 Answer State that a polypeptide is coded for by a gene and that a gene is a sequence of nucleotides that forms part of a DNA molecule
1 Answer Explain that a gene mutation is a result of substitution or deletion or insertion of nucleotides in DNA and outline how each of these types of mutation may affect the polypeptide produced
1 Answer State that a gene mutation is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide
1 Answer State that the strand of a DNA molecule that is used in transcription is called the transcribed or template strand and that the other strand is called the non-transcribed strand
1 Answer Explain that, in eukaryotes, the RNA molecule formed following transcription (primary transcript) is modified by the removal of non-coding sequences (introns) and the joining together of coding sequences (exons) to form mRNA
1 Answer 
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