Agriculture - Online Test
Q1. In Barley stem, vascular bundles are
Answer : Option B
Explaination / Solution:
The vascular bundles in Hordeum vulgare (barley) plant are scattered in ground tissues, many in number and vary in size-smaller towards periphery and bigger towards centre of the ground tissue, oval or rounded in outline, conjoint, collateral and closed.
Q2. The mature seeds of plants do not possess endosperm because
Answer : Option D
Explaination / Solution:
The mature seeds of plants do not possess endosperm because, it gets used up by the developing embryo during seed development.
Q3. Kinetin was identified by
Answer : Option A
Explaination / Solution:
The discovery of Kinetin is comparatively more recent. Its credit goes to Miller et al (1955) who were working in Prof. Skoog’s laboratory at the University of Wisconsin on the growth of tobacco pith callus in culture and wanted it to grow indefinitely.
Q4. Select the wrong pair of vegetative propoagules from the following pairs?
Answer : Option B
Explaination / Solution:
The wrong pair of vegetative propoagules is rhizome-potato. Potato is grown vegetatively by eyes present on underground modified tubers. Vegetative propagation is a mode of asexual reproduction.
Q5. Which of the following statement is true with respect to the movement through apoplast?
Answer : Option D
Explaination / Solution:
The apoplastic movement of water occursexclusively through the intercellular spaces and the walls of the cells. Movement through the apoplast does not involve crossing the cellmembrane. This movement is dependent on the gradient. The apoplast does not provide any barrier to water movement and water movement is through mass flow.
Q6. The outer most layer of maize endosperm is
Answer : Option A
Explaination / Solution:
Maize is monocotyledonous seed containing large amount of endosperm as reserve food. It is covered by a thin layer called as alurone layer. This layer is protective in nature.
Q7. The productivity of a soil depends upon the proportionate amount of deficient mineral is called
Answer : Option B
Explaination / Solution:
Justus von Liebig's Law of the Minimum states that yield is proportional to the amount of the most limiting nutrient, whichever nutrient it may be.
From this, it may be inferred that if the deficient nutrient is supplied, yields may be improved to the point that some other nutrient is needed in greater quantity than the soil can provide, and the Law of the Minimum would apply in turn to that nutrient.
Q8. The main plant body of the bryophyte is
Answer : Option C
Explaination / Solution:
The main plant body of the bryophyte is haploid. It produces gametes, hence is called a gametophyte.
Q9. Chloroplast stroma contains
Answer : Option D
Explaination / Solution:
Chloroplast contains stroma and grana. Stroma are involved in light independent reaction enzymes for synthesis of glucose molecules using proudcut of light reaction.
Q10. Sex determination in human being is
Answer : Option D
Explaination / Solution:
In human beings, a pair of X chromosome is found in female and presence of an X and Y chromosome are determinant of male characteristic.
