Mycorrhiza is an example of

• endoparasitism

• decomposers

• symbiotic relationship

• ectoparasitism

A metal ion involved in stomatal regulation is :

• iron

• potassium

• zinc

• magnesium

173.

The plant ash is an indication of :

• organic matter of plant

• waste product

• mineral salts absorbed by plants

• none of these

Hydroponics is

• cultivation of plants in water

• growth of plants towards water

• growth of plants away from water

• soil less cultivation of plants

When one element is involved in opening and closing of stomata, the other helps to maintain the ribosome  structure. They are

• Potassium and calcium

• Phosphorus and sulphur

• Potassium and magnesium

• Iron and magnesium

• Iron and magnesium

Which of the following groups of minerals are micronutrients?

• Magnesium, Manganese, Copper, Boron and Phosphorus

• Manganese, Copper, Magnesium, Zinc and Boron

• Nitrogen, Potassium, Manganese, Copper and Iron

• Iron, Manganese, Copper, Molybdenum and Zinc

• Iron, Manganese, Copper, Molybdenum and Zinc

Match the mineral in Column I with the enzyme activated in
Column II and choose the correct option.

Column I	Column II
(A) Magnesium	(1) Alcohol dehydrogenase
(B) Molybdenum	(2) Phosphoenolpyruvate carboxylase
(C) Zinc	(3) Nitrogenase

• A - 2; B - 3; C - 1

• A - 1; B - 2; C - 3

• A - 2; B - 1; C - 3

• A - 3; B - 2; C - 1

• A - 3; B - 2; C - 1

Free living nitrogen fixing aerobic bacterium is

• Rhodospirillum

• Anabaena

• Nostoc

• Beijernickia

• Beijernickia

Match the Column I with that of Column II and choose the correct combination from the options given

Column I- Essential elements	Column II- Deficiency causes
A. N, K, Mg, S, Fe, Mn, Zn, and Mo	1. Inhibit cell division
B. N, K, S and Mo	2. Necrosis
C. Ca, Mg, Cu and K	3. Delay in flowering
D. N, S and Mo	4. Chlorosis

• A - 4; B - 3; C - 2; D - 1

• A - 1; B - 2; C - 3; D - 4

• A - 4; B - 1; C - 2; D - 3

• A - 2; B - 3; C - 4; D - 1

• A - 2; B - 3; C - 4; D - 1

Which of the following is not a role played by potassium in plant growth?

• Translocation of carbohydrates

• Maintaining anion-cation balance

• Opening and closing of stomata

• Synthesis of protein

• Synthesis of protein