The most abundant element present in the plant is:
1. Nitrogen
2. Manganese
3. Iron
4. Carbon
A nutritionally wild type organism, which does not require any additional growth supplement is known as:
1. Holotype
2. Auxotroph
3. Prototroph
4. Phenotype
Anabaena is associated with Azolla's:
1. Stem
2. Leaves
3. Roots
4. Flowers
Which of the following does not contain metal:
1. Glycoproteins
2. Ferritin
3. Cytochromes
4. Chromoproteins
Nitrogen-fixing bacteria converts:
1.
2.
3.
4.
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 take zinc in the form of:
1. ZnSO4 | 2. Zn2+ |
3. ZnO | 4. Zn |
An aquatic fern that is used to increase the yield of paddy crops:
1. Azolla
2. Salvinia
3. Marsilea
4. Isoetes
The major role of minor elements inside living organisms is to act as:
1. Co-factors of enzymes
2. Building blocks of important amino acids
3. Constituent of hormones
4. Binder of cell structure