Agriculture - Online Test
Q1.
Identify the plant shown in the figure given below.
Answer : Option D
Explaination / Solution:
The plant shown above is cycas. This plant belongs to division Cycadophyta and family Cycadaceae. It is dioecious and Cycas circinalis species is endemic to India.
Q2. Which of the following stages of calvin cycle are in correct order?
Answer : Option B
Explaination / Solution:
The Calvin cycle can be described under three stages: carboxylation, reduction and regeneration.Pathway operated in cyclic manner.
Q3. Whose karyotype is represented below?
Answer : Option B
Explaination / Solution:
Karyotype is the representation of chromosome in order of shape and size. Male Drosophila fly have 3 pairs of autosomes and 1 pair (XY) sex chromosome.
Q4. Number of glucose molecule required to produce 38 ATP under anaerobic condition is
Answer : Option C
Explaination / Solution:
During anaerobic respiration only two molecules of ATP is produced by each molecules of glucose.
So, 19 glucose molecules are required to produce 38 ATP molecules.
Q5. In which type of placentation, the ovary is unilocularwith a single ovule?
Answer : Option D
Explaination / Solution:
In basalplacentation, the placenta develops at the base of ovary and a single ovule is attached to it,
Q6. Stem of grasses and related plants elongate by the activity of
Answer : Option A
Explaination / Solution:
Grasses belongs to monocotyledonous angiosperms in which secondary growth do not occurs. Plants elongate by the activity of both apical and intercalary meristem.
Q7. Separate xylem and phloem bundles are known as
Answer : Option C
Explaination / Solution:
Separate xylem and phloem bundles are found in dicotyledonous roots. This kind of vascular bundle is called radial vascular bundle.
Q8. Which of the following hormone is used to kill dicotyledonous weeds?
Answer : Option C
Explaination / Solution:
2, 4 D (2,4-Dichlorophenoxyacetic acid)are widely used as herbicides. It is widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants.
Q9. Find the correct order of vegetative propoagules in potato, ginger Bryophyllum and water hyacinth
Answer : Option B
Explaination / Solution:
Potato tubers have eyes, ginger propagates through underground rhizome, Bryophyllum leaves have buds and water hyacinth propagates by offset stem. All these structures are mode of asexual reproduction
Q10. Rupture and fractionalization of water column present in treachery elements does not occur during ascent of sap due to
Answer : Option A
Explaination / Solution:
Cohesion and adhesion between wall of tracheid and water molecule prevent rupture and fractionalization of water column present in treachery elements during ascent of sap.
