Plant Pathology - Study Mode

[#261] CAN is not acid forming fertiliser, because it contains
Correct Answer

(C) Calcium

Explanation

Solution: CAN is not acid forming fertilizer, because it contains Calcium. Calcium ammonium nitrate is hygroscopic. Its dissolution in water is endothermic, leading to its use in some instant cold packs. Fertilizer grade CAN contain roughly 8% calcium and 21 - 27% nitrogen. CAN is preferred for use on acid soils, as it acidifies the soil, it lowers the pH of the soil, but does not acidify it because of the presence of calcium.

[#262] An organism which causes a disease in plant is called as
Correct Answer

(D) Pathogen

Explanation

Solution: An organism that causes a disease in a plant is called as Pathogen. A pathogen in the oldest and broadest sense is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. Typically, the term pathogen is used to describe an infectious microorganism or agent, such as a virus, bacterium, protozoan, prion, viroid, or fungus.

[#263] Graftring is not possible in monocots as they
Correct Answer

(A) Lack cambium

Explanation

Solution: Grafting is not possible in monocots as they Lack cambium. Monocots cannot produce a vascular cambium or woody growth, some monocot lineages evolved a novel lateral meristem, the monocot cambium, which supports the secondary radial growth of stems.

[#264] Active transport occurs
Correct Answer

(A) Agairist concentration gradient and requires ATP

Explanation

Solution: Active transport occurs against a concentration gradient and requires ATP. It occurs when molecules such as glucose or amino acids move from high concentration to low concentration facilitated by carrier proteins or pores in the membrane. Primary active transport moves ions across a membrane and creates a difference in charge across that membrane. The primary active transport system uses ATP to move a substance, such as an ion, into the cell, and often at the same time, a second substance is moved out of the cell.

[#265] Match the following columns: Column I (Nutrients) Column II (Functions) a. Sulphur 1. Increase oil quality b. Potassium 2. Essential constituent of chlorophyII c. Calcium 3. Eessentia constituent of cell d. Magnesium 4. Enhance drought and disease resistant power.
Correct Answer

(B) a-1, b-4, c-3, d-2

Explanation

Solution: a. Sulphur increases oil quality. Sulphur application increases oil and protein contents in seeds. It also increases the availability of other nutrients such as phosphorus, potassium, and zinc and suppresses the uptake of sodium and chlorine which are toxic to plant growth and development. b. Potassium enhances drought and disease-resistant power. Potassium is associated with the movement of water, nutrients and carbohydrates in plant tissue. Under drought stress conditions, K regulates the stomatal opening and helps plants adapt to water deficits. c. Calcium is an essential constituent of the cell. Calcium is a constituent of the cell wall in the form of calcium pectate. It is required in small amounts for normal mitosis. Calcium is also involved in chromatin or mitotic spindle organization. d. Magnesium is an essential constituent of chlorophyll. The main constituent element of chlorophyll is Magnesium. Chlorophyll is the pigment found in the chloroplast. It is responsible for the green color of plants. The general formula of chlorophyll is C 55 H 72 O 5 N 4 Mg.