The correct chronological order is (iii) Pollination, (i) Pollen germination on stigma, (ii) Fertilisation and (iv) Formation of zygote, tracing pollen transfer to the eventual fusion of male and female gametes. CBSE Class 9 Science Chapter 11 Reproduction How Life Continues ...
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The correct option is (ii) Cross-pollination. Removing the anthers prevents self-pollination, while dusting pollen from a distinct individual plant of the same species onto the stigma guarantees cross-pollination. Class 9 Science Chapter 11 Reproduction How Life Continues Solutions Chapter 11 Reproduction ...
Since both sound waves travel the same round-trip distance, speed is inversely proportional to time. Taking the ratio of time taken gives the speed ratio of air to water as 1:4.5 or 2:9. Class 9 Science Exploration Chapter 10 Important Questions ...
Wave A completes one cycle in 2.5 cm, giving 13,800 Hz frequency. Wave B completes one cycle in 5.0 cm, giving a frequency of 6900 Hz at 345 m s⁻¹. Class 9 Science Exploration New Book All Chapter Solution Revise, Reflect, ...
The 8 cm span covers two consecutive wavelengths, giving a wavelength of 4 cm or 0.04 m. Dividing the speed of 340 m s⁻¹ by 0.04 m yields 8500 Hz. Chapter 10 Sound Waves Characteristics and Applications Solutions Sound Waves Characteristics ...