Transcript Slide 1
Acceptable Answers A B Better/ increasd chance/ More/germination/new plants/offspring/seeds germinate C Increased chance of survival in changing environment/ conditions/ able to resist cold/ drought/ disease Colinisation of new areas /reduced competition between individuals of SAME sp / reduce comp.with parents (must have 2 for 1 mark) (1 mark) Extra / less arrows= mark lost Support/ to keep plant upright/ transport of minerals/ salts/ mineral salts D A More/ greater/ water loss from lower leaves/ bottom surface (or opp.) or water is lost from both surfaces Wrong Answers A more offspring/ more plants-Must indicate bettermore/ greater CHANCE C / Greater variation but no explanation given B reduce comp./ reduce overcrowding/ reduce comp. for light /water Must show clearly comp. between inds. of SAME species. -no mark for stating results from table Strength/ transports nutrients/ stores carbohydrates -greater weight loss/ bottom of leaf/ any mention of stomata/ more stomata ACCEPTABLE ANSWERS PetalStigma Small Expose reproductive parts/ stigma + stamens exposed large and branched/ feathery/ hangs outside to catch POLLEN Stamen/ anther/ filament/ Loosely attached/ Prevents seeds drying out/ keeps seeds moist/ so each group has the same volume of water Long and dangling/ Hangs outside POLLEN easily blown away Stops light from having any effect/ keeps light conds. The same/ so they were in the dark like the others. Variation of offspring/ offspring genetically different/ less competition/ plants will adapt to new conds. -Successful characteristics are kept/ unchanged -Young plants same as parents/ looks / genetically 0/ no germination -No need for germination/ poll./ fert. 22 -Vulnerable stages avoided -Clumps formed so reducing comp. from other sps. 0 Wrong Answers Petals Anything to do with colour or pattern Stigma Stamen/anther /fila. Not sticky stigma The anthers look alike Nothing to do with O2, temp.or volume./ Seeds need water/ preventing gases getting to the seeds / contamination -To see if they grew without light. -Making it a fair test More chance of survival/ species survival Growth is fast/ only I parent involved Any box left blank= 0 marks .any 2 nos. in I line=0 marks.