A2 OCR Biology | F215 Module 4 - Plant Responses

Thorough but straight to the point - A six page PDF on Plant Responses for A2 Biology that are specific to Module 4 of the F215 Chapter in the OCR Biology Specification, of which can be found on the OCR website. Enjoy, hope they're of use!

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

a) Plants need to respond to their environment in terms of predation and abiotic stress to
increase chances of survival for example they may be subject to herbivory where herbivores
will eat…

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

d) Apical Dominance ­ The Apical Bud at the tip of the shoot inhibits growth of the Lateral Buds
further down the plant.

Apical Dominance inhibits Lateral Buds (Side Shoots) from growing…

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

4. The conclusion should state that:

These results showed that removing the tips of shoots caused extra side shoots to grow
because of the low Auxin concentration unable to inhibit the growth…

Page 4

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

3. Both sets of plants should be left to grow for 28 days in the same conditions such as light
intensity and the same amount of water regularly so no variables affect…

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

e) Leaf Abscission is a response to Abiotic stress that is triggered by the shortening of days, when
there is less daylight within a day, during the transition to winter through autumn.…

Page 6

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Biology A | F215 Module 4 ­ Plant Responses Dean Williams

- Suited to the F215 Specification -

Rooting powder which also contains Auxins can be used to make many cuttings of different
plants or the same plants form new roots and grow into whole new plants. Because Auxins can…

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