part 3

Question 1

boron

Answer 1

required for the uptake of Ca2+, membrane functioning, cell differentiation, cell elongation, and carbohydrate translocation

Question 2

boron’s deficiency symptoms

Answer 2

death of stem and root apices
loss of apical dominance
rosseting of leaves, stem brittle but stout

Question 3

copper and its deficiency symptoms

Answer 3

component of plastocyanin and RuBp carboxylase

deficiency: 1. Reduced absorption of Co2
2. necrosis at the tip of the young leaves and then the margins

Question 4

zinc and its deficiency symptom

Answer 4

activates carboxylase. Required for the synthesis of auxin

deficiency: yellow streak on leaves

Question 5

chlorine

Answer 5

component of oxygen evolving complex. anion-cation balance in the cells

Question 6

chlorine’s deficiency symptoms

Answer 6

bronze color in leaves, chlorosis and necrosis

Question 7

etiolation

Answer 7

symptoms seen in the plant where the plant is grown in complete darkness