Agriculture - Online Test
Q1. Energy is stored in the form of
Answer : Option C
Explaination / Solution:
Cells store energy in a molecule called adenosine triphosphate (abbreviated as ATP). The adenosine molecule has three phosphate groups attached to it (triphosphate means three phosphates) which are held together by high energy bonds.
If one of these bonds is broken, a great amount of energy is released which can be used in an endergonic reaction.
Q2. 120 0 1200 phyllotaxy occurs in
Answer : Option A
Explaination / Solution:
Phyllotaxy is the arrangement of leaves on a plant stem. 1200 phyllotaxy occurs in Tristichousarrangementin which three leaves are arranged at each node.
Q3. In some plants diploid embryo sac develop directly from diploid megaspore mother cell. This condition is called as Megaspore mother cell are diploid, which generally undergo reduction division to produce megaspore but in some plants diploid megaspore mother cell directly produce diploid embryo sac this condition is called diplospory
Answer : Option D
Explaination / Solution:
Megaspore mother cell are diploid, which generally undergo reduction division to produce megaspore but in some plants diploid megaspore mother cell directly produce diploid embryo sac this condition is called diplospory
Q4. Epidermal appendages, unicellular or multicellular outgrowth strictly epidermal in origin is
Answer : Option C
Explaination / Solution:
Trichomes are epidermal appendages, unicellular or multicellular outgrowth strictly epidermal in origin present on the stem of plants.
Q5. Higher plants possess specific areas which take part in the formation of new cells. These area are called
Answer : Option C
Explaination / Solution:
The tissues that have ability of cell division located in specific area are called meristem. They are located at stem and root tips, nodes of stem and intercalary region.
Q6.
Identify the figure given below:-
Answer : Option A
Explaination / Solution:
Rhizome of ginger is modified root, located inside the soil parallel to earth surface. Vegetative propagation of ginger is done with it.
Q7. denotes to
Answer : Option C
Explaination / Solution:
Pressure potential is usually positive, though in plants negative potential or tension inthe water column in the xylem plays a major role in water transport up a stem. Pressure potential is denoted as .
Q8. Which two minerals are not needed by the majority of plants but very much needed by almost all animals?
Answer : Option C
Explaination / Solution:
Sodium and Iodine minerals are not needed by the majority of plants but sodium and iodine minerals are very much needed by almost all animals. Sodium play important role in nervous system and iodine for synthesis thyroxine hormone.
Q9. Identify the algae present in the figure
Answer : Option C
Explaination / Solution:
The algae present in the figure is Chlamydomonas which is a unicellular algae present in fresh water. Two flagella is attached to it that helps in the movement in water.
Q10. Name the central element present in chlorophyll.
Answer : Option B
Explaination / Solution:
As chlorophyll is a complex compoumd, Magnesium(Mg) is found in the centre of the structure of this compond.
