Agriculture - Online Test
Q1. Which one is not a reason of mineral depletion in the soil?
Answer : Option D
Explaination / Solution:
Mineral deficiency in soil may be due to use of high yielding varieties, non-rotation of crops and leeching of minerals. Growing leguminous plants do not deplete the mineral in soil.
Q2. Asexual reproduction in liverworts takes place by specialised structures, commonly known as
Answer : Option D
Explaination / Solution:
Asexual reproduction in liverworts takes place by the formation of specialised structures called gemmae (sing. gemma). Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli. The gemmae become detached from the parent body and germinate to form new individuals.
Q3. The stroma of chloroplast contains
Answer : Option D
Explaination / Solution:
In stroma, enzymatic reactions incorporate into the plant leading tothe synthesis of sugar, whichare not directly light driven but are dependent on the products of light reactions (ATP and NADPH). Hence, to distinguish the latter they are called, by convention, as dark reactions. However, this should not be construed to mean that they occur in darkness or that they are not lightdependent.
Q4. A cross between AaBB X aaBB yields a genotypic ratio of
Answer : Option D
Explaination / Solution:
Genotypic ratio of cross between AaBB and aaBB will be 1:1 as AaBB and aaBB in F1 generation.
Q5. Anaerobic respiration of yeast produces
Answer : Option D
Explaination / Solution:
Anaerobic respiration in some microorganisms such as yeast produces ethanol and carbon dioxide, as opposed to lactic acid.
Glucose is achieved under anaerobic conditions by sets of reactions.
It can be summarised by the following equation:
glucose → ethanol + carbon dioxide ( + energy released)
Q6. Bladders of Uricularia and Pitchers of Nepenthes are modification of
Answer : Option C
Explaination / Solution:
Bladders of Uricularia and Pitcher of Nepenthes are modification of leaves. They are modified to catch insects that is insectivorous plants.
Q7. Filiform apparatus present at micropylar part of the Synergids help in
Answer : Option A
Explaination / Solution:
Filiform apparatus is finger-like projection attached with egg apparatus. This apparatus guide the pollen tube carrying male gametes for facilitating Syngamy.
Q8. In monocotyledons, guard cell of stomata are
Answer : Option C
Explaination / Solution:
In monocotyledons, the guard cell of stomata are dumb-bell shaped, thicker on top and bottom and thinner in the middle.
Q9. It is the testing of a biological activity like growth response of a substance by employing a living material like plant or plant part.
Answer : Option B
Explaination / Solution:
Testing of biological activity like growth response of a substance by employing a living material like plant or plant part is called bioassay. It is used to know the effect of substance on plant growth.
Q10. Vegetatively propagated plants are generally
Answer : Option C
Explaination / Solution:
In vegetative propagation is the asexual mode of reproduction in which plants parts are used to grow new plants. Since fusion of gametes is not involved in the process all individual produced vegetatively are genetically similar.
