Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

Endosperm is Triploid.
The endosperm is a tissue produced inside the seeds of most flowering plants following double fertilization.
Endosperm is formed when the two sperm nuclei inside a pollen grain reach the interior of a female gametophyte. One sperm nucleus fertilizes the egg cell, forming a zygote, while the other sperm nucleus usually fuses with the binucleate central cell, forming a primary endosperm cell. That cell created in the process of double fertilization develops into the endosperm.

Sulphur dioxide is toxic to plants at or above 0.3 - 0.5 ppm.
Sulphur dioxide is a colourless gas at ambient temperature and pressure. It can be detected by taste at concentrations of 0.35 - 1.05 ppm and has a pungent, irritating odour with an odour threshold of 0.67 - 4.75 ppm.

Calaxin is the most recently widely used fungicide for the control of powdery mildew.
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery Mildew (Acrosporium tingitaninum) is a Whitish powdery mass that develops on the young leaves and twigs. Affected leaves get distorted.
Powdery mildew can be controlled easily by spraying Wettable Sulphur (1.5 kg/200 litres of water). Sulphur dusting (20 kg/hectare) in the morning hours controls the disease effectively. Systemic fungicides like Bayleton (1 g/litre of water) or Calaxin (3 - 4 ml/10 litres of water) or Benomyl (5 g/10 litres of water) offer better and prolonged control of the disease.

Systema Naturae is published by Carl Linnaeus.
Systema Naturae is one of the major works of the Swedish botanist, zoologist and physician Carl Linnaeus (1707 - 1778) and introduced the Linnaean taxonomy.
Linnaeus published the first edition of Systema Naturae in the year 1735, during his stay in the Netherlands. The book was published in Latin. In it, he outlined his ideas for the hierarchical classification of the natural world, dividing it into the animal kingdom (regnum animale), the plant kingdom (regnum vegetabile), and the "mineral kingdom" (regnum lapideum).

A. Dazomet - Mylone
Dazomet is a common soil fumigant that acts as an herbicide, fungicide, slimicide, and nematicide. It is also known as Mylone. It is a chemical used to kill pests that inhibit plant growth through gaseous degradation.
B. Phorate - Nemachur is not correctly matched.
Phorate is an organophosphate used as an insecticide and acaricide. It is relatively stable and hydrolyses only at very acidic or basic conditions. It is very toxic both for target organisms and for mammals including humans.
C. Aldicarb - Temik
Aldicarb is a carbamate insecticide which is the active substance in the pesticide Temik. It is effective against thrips, aphids, spider mites, lygus, fleahoppers and leafminers.
D. Carbofuran - Furadan
Carbofuran is a carbamate pesticide, widely used around the world to control insects on a wide variety of field crops, including potatoes, corn and soybeans. It is marketed under the trade name Furadan, by FMC Corporation.

Citrus canker (lesions), which originated from China is caused by the pathogen Xanthomonas campestris pv. citr.
Citrus canker is a disease affecting Citrus species caused by the bacterium Xanthomonas (X.axonopodis; X. campestris).
Infection causes lesions on the leaves, stems, and fruit of citrus trees, including lime, oranges and grapefruit.
The disease, which is believed to have originated in Southeast Asia, is extremely persistent when it becomes established in an area.

Core metal of chlorophyll is Mg.
Chlorophyll is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants.
The presence of magnesium in chlorophyll was discovered in 1906, and was that element's first detection in living tissue. A molecular formula of C₅₅H₇₀O₆N₄Mg and a structure of (2-formyl)-chlorophyll were deduced based on NMR.

Saproleginia is fungi that is known as aquatic mould.
Saprolegnia is a genus of water moulds often called cotton moulds because of the characteristic white or grey fibrous patches they form.
Saprolegnia filaments (hyphae) are long with rounded ends, containing the zoospores. Saprolegnia generally travels in colonies consisting of one or more species.

The number of chlorophyll molecules in a quantasome is 200 - 250.
Quantasomes were first identified by Roderic B. Park in 1962.
Quantasomes are particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place. They are embedded in a paracrystalline array on the surface of thylakoid discs in chloroplasts.
Each quantasome contains about 230 - 250 chlorophyll molecules and 50 molecules of carotenoids.

Metabolism of one palmitic acid yields 136 ATP.
Palmitic Acid is a saturated long-chain fatty acid with a 16-carbon backbone. Palmitic acid is found naturally in palm oil and palm kernel oil, as well as in butter, cheese, milk and meat.
Palmitic acid is the first fatty acid produced during fatty acid synthesis and is the precursor to longer fatty acids. Complete oxidation of palmitic acid leads to the production of 136 ATPs.