Insectivorous plants grow in the soil which is deficient in:
1. Mg
2. Ca
3. P
4. N
When the plants are grown in magnesium-deficient but urea-rich soil, the symptoms expressed are:
1. Yellowish leaves
2. Colourless petiole
3. Dark green leaves
4. Shoot apex die
Plants deficient in the element zinc show its effect on the biosynthesis of which plant growth hormone:
1. | Auxin | 2. | Cytokinin |
3. | Ethylene | 4. | Abscissic acid |
Grey spots of oat are caused by deficiency of:
1. Cu
2. Zn
3. Mn
4. Fe