15949.Essential macro elements are
Manufactured during photosynthesis
Produced by enzymes
Absorbed from soil
Produced by growth hormones
15955.Fertility of soil in rice fields can be improved by
Blue green algae
Sodium chloride
Gypsum
Rhizobium
15956.Function of zinc is
Closing of stomata
Biosynthesis of 3-IAA
Synthesis of chlorophyll
Oxidation of carbohydrate
15957.Nitrifying bacteria
Reduce nitrates to free nitrogen
Oxidize ammonia to nitrates
Convert free nitrogen to nitrogen compounds
Convert proteins into ammonia
15959.Which of the following is a rootless aquatic plant in which a portion of the leaf forms a tiny sac for trapping insects?
Utricularia
Drosera
Nepenthes
Dionaea
15960.Mineral salts which are absorbed by the roots from soil are in the form of
Dilute solution
Very concentrated solution
Concentrated solution
Very dilute solution
15961.Hydroponics are
Growing of aquatic plants
Growing of floating aquatic plants
Growing of plants in sand
Growing of plants aqueous balanced nutrient
15963.Which one of the following mineral elements plays an in biological nitrogen fixation?
Copper
Manganese
Zinc
Molybdenum
15964.A trace element is that which is
Traced by Geiger counter
Discovered first in a cell
Required in minute quantities
Draws other elements out of protoplasm
15965.Active transport from outside to inside of molecules across a membrane requires
Cyclic AMP
Acetyle chlorine
ATP
Phloroglucinol
15966.Important contribution of molybdenum is
Chromosome condensation
Nitrogen fixation
Flower growth
Carbon fixation
15967.Match the followings an choose the correct combination from the options given:
| List - I | List - II | ||
|---|---|---|---|
| a. | Sulphur | 1. | Chlorophyll |
| b. | Zinc | 2. | Nitrogenase |
| c. | Magnesium | 3. | Methionine |
| d. | Molybdenum | 4. | Auxin |
a – 1, b – 2, c – 3, d – 4
a – 3, b – 4, c – 1, d – 2
a – 3, b – 1, c – 2, d – 4
a – 2, b – 4, c – 1, d – 3
15968.Insectivorous plants are called so because
All insects eat these plants
Insects like such plants
They are herbivorous
They catch insects for food