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Which of the following statements are true about ecosystem? Select the correct answer from the codes: 1. Ecosystem comprises both biotic and abiotic components. 2. Solar energy is the main driving force of the ecosystem. 3. Ecosystem is a closed system. 4. Ecosystem does not have its own productivity.
Consider the following statements and choose the correct answer:
1. The ecosystem is a major ecological unit
2. The function of ecosystem is related to the flow of energy and the cycling of materials through the structural components of the ecosystem
3. The major functional unit of the ecosystem is the population
4. The ecosystem has historical aspects: the present is related to the past, and the future is related to the present
Consider the following statements with respect to the Export Preparedness Index, 2020: 1. It was published by the NITI Aayog in partnership with the Institute of Competitiveness. 2. It examines the export ecosystem of Indian States and Union Territories. 3. Policy, Business Ecosystem, Export Ecosystem and Export Performance are the four pillars of the Export Preparedness Index. 4. Gujarat emerged as the top-performing State in the 'Coastal States' category, followed by Kerala and Tamil Nadu. 5. In the category of 'Landlocked States', Madhya Pradesh is the best-performing State. Among 'Himalayan States' and 'City-States' Himachal Pradesh and Delhi are the top-performing States respectively. Which of the above statements are true?
Which of the following statements are correctly matched? a) Pyramid of number in Grassland Ecosystem is upright. b) Pyramid of Biomass in Pond Ecosystem is inverted. c) Pyramid of Energy is always upright. d) Pyramid of Biomass in Forest Ecosystem is inverted. Choose the correct answer
An ecosystem is joined by thousands of species, if a problem occurs causing a species to become extinct, it may not affect the proper functioning of the ecosystem initially, but as more and more species are removed, the ecosystem becomes dangerously weak over a period of time. Which hypothesis gave this sentence?
Consider the following statements 1. The electrostatic force is an example of a contact force. 2. The frictional force is an example of a contact force. 3. The nuclear force is an example of a contact force. Which of the following statements is/are correct?
The elastic potential energy of a body is
1. Work done by the external force against the deforming force.
2. Work done against the external force by the deforming force.
3. The sum of work done by the external force and the deforming force.
Which one option is true?
Certain facts about Force are given below. Identify the true information. A. Force is a scalar quantity. B. Gravitational force is the weakest force. C. Electromagnetic force is the strongest force. D. When sum of all forces acting on a body is zero, the body is said to be in a state of equilibrium.
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)
The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2 = 0.1 R1, the corresponding driving force ΔG2 = αΔG1, where α is