Agriculture - Online Test
Q1. Scientist awarded noble prize in 1960 for tracing the path of carbon is
Answer : Option A
Explaination / Solution:
Melvin Calvin awarded noble prize in 1960 for tracing the path of carbon during photosynthesis. The cycle of event is named after him as Calvin cycle.
Q2. Hemophilia is more commonly seen in human males than in human females because
Answer : Option A
Explaination / Solution:
Hemophilia is sex-linked recessive disease due to mutation in X-chromosome. In this disease blood clotting do not takes place in case of injury and minor cut leads to death of individual.
Q3. Krebs cycle is both catabolic and anabolic because it provides
Answer : Option B
Explaination / Solution:
Kreb’s cycle is both catabolic and anabolic because it provides a number of intermediates which are product of catabolism as well as anabolism.
Q4. Upper surface of leaf is
Answer : Option C
Explaination / Solution:
Epidermal cells are present on both side of leaves. The lower side contain more stomata. The upper surface of leaf is called as adaxial epidermis.
Q5. The ovary belonging to a single free carpel is called
Answer : Option C
Explaination / Solution:
When more than one carpel is present, they may be free, it is called apocarpous
Q6. The most commonly used compound as a source of ethylene
Answer : Option B
Explaination / Solution:
The most widely used compound as source of ethylene is ethephon. Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly.
Q7. Symplastic movement is aided by
Answer : Option B
Explaination / Solution:
Symplastic movement may be aided by cytoplasmic streaming. We can observed cytoplasmic streaming in cells of the Hydrilla leaf.
Q8. Cultivation of hybrids has increased productivity although it is not used extensively
Answer : Option D
Explaination / Solution:
Hybrid seeds are produced to increase the productivity, resistivity and nutritional value of seed and fruit. It is not used extensively as hybrid seeds have to be produced every year so it becomes costly to farmers.
Q9. In legumes, rhizobium bacteria are found in
Answer : Option D
Explaination / Solution:
Nitrogen-fixing bacteria, especially roots of legumes, can fix this atmospheric nitrogen into biologically usable forms.
Q10. Which of the following organism produce gemmules as asexual reproductive structure?
Answer : Option B
Explaination / Solution:
Gemmules are asexual reproductive structure produced by sponges. Chlamydomonas produce zoospores, hydra produce buds and Penicillium produces conidia.
