1. Higher – Unit 3 Growth and development Chapter 27-

2. 1- What is the name of the region of a plant containing undifferentiated plant cells.

3. In a root tip, what happens between the region of elongation and the permanent tissues?

4. 3- What is the other name given to lateral meristems responsible for secondary growth?

5. 4- Name the three tissues where regeneration takes place in animals.

6. 5- Define growth

7. 6- Name the enzyme responsible for the breaking down of lactose in glucose and galactose

8. 7- In phenylketonuria, which amino- acid accumulates?

9. 8- Albinism is a failure to synthesize which compound?

10. 9- Where is TSH synthesised?

11. 10- What is the other name of somatotrophin?

12. 11- What is the effect of high concentration of IAA on shoots?

13. 12- What is the effect of high concentration of IAA on roots?

14. Answers 1- Meristem (1) 2- Differentiation (1) 3- Cambium (1) 4- bones, wounds, blood or liver (3) 5- An irreversible increase in DRY mass (1) 6- β- galactosidase 7- Phenylalanine 8- Melanin 9- Anterior pituitary 10- Growth hormone 11- increased growth 12- Growth inhibition