Agriculture - Online Test
Q1. On germination, moss spore produce
Answer : Option D
Explaination / Solution:
The spore of moss germinate to produce protonema, which is a green, branched and frequently filamentous stage and develops a lateral bud which is called as secondary protonema or a leafy stage.Secondary protonema also gives rise to gametophore initials. Secondary protonema can undergo both sexual and asexual modes of reproduction. It reproduces asexually by the processes of budding and fragmentation. Sexual reproduction is the process which occurs in the leafy stage.
Q2. The substances like ATP carry energy in
Answer : Option D
Explaination / Solution:
Living organisms have the capability of extracting energy from oxidisable substances and store this in the form of bond energy. Special substances like ATP, carry this energy in their chemical bonds.
Q3. Heterozygous tall plants were crossed with dwarf plants what will be the ratio of dwarf plants in the following progeny?
Answer : Option B
Explaination / Solution:
Heterozygous tall plant (Tt) is crossed with homozygous dwarf (tt) the percentage of dwarf plants is 50 percent.
Q4. Which one is not a preparatory phase or energy spending phase of Glycoloysis
Answer : Option B
Explaination / Solution:
Formation of pyruvate is not a prerparatory phase or energy spending phase of Glycolysis. In this phase one ATP molecule is released.
Q5. In Ocimum sanctum(tulsi), stem is
Answer : Option A
Explaination / Solution:
The stem of Oscimum sanctum or tulsi is quadrangular in shape. The stem is covered with hairy projection.
Q6. How many meiotic divisions are required to form 64 pollen grains
Answer : Option A
Explaination / Solution:
Each microspore mother cell produces four pollen grains by reduction division. Hence to produce 64 pollen grains 16 meiotic or reduction division is required.
Q7. Jute fibers deteriorate because they have
Answer : Option A
Explaination / Solution:
Jute fibers are made of high amount of lignin that deteriorate in presence of high moisture and water,
Q8. Mathematically arithmetic growth is expressed as
Answer : Option C
Explaination / Solution:
Arithmetic growth is represented by where Lt is final growth, Lo is initial size and rt is the rate of growth and time respectively.
Q9. Stem cutting is used in the propagation of
Answer : Option C
Explaination / Solution:
Stem cutting is a mode of vegetative propagation in which stem is cut into pieces having at least one node. From the node new plantlet emerge out. Mango and cotton are grown by seeds and Banana by root cutting.
Q10. A concept fundamental to understanding water movement is called
Answer : Option A
Explaination / Solution:
Plant-water relations, an understanding of certainstandard terms is necessary. Water potential is a concept fundamental to understand water movement. Solute potential and pressure potential are the two main components that determine water potential.
