cbse board date sheet 2023-24 – Discussion Forum

Sign Up

Sign In

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

You must login to ask question.

Search

Ask A Question

Mayur Arya

Asked: December 27, 2023In: Class 10 Science

Certain specialised cells in animals called stem cells have the ability to divide and differentiate into different cell types. This helps in the replacement of a damaged organ. Name and explain two methods of asexual reproduction that are similar to stem cells and occur mostly in multicellular organisms. (b) Identify TWO pairs of reproductive organs in males and females that are functionally similar to each other. Justify.

Asexual reproduction involves the creation of offspring without the fusion of gametes. It produces genetically identical or nearly identical copies of the parent organism, commonly observed in bacteria, plants, and some animals.

Mayur Arya

Asked: December 27, 2023In: Class 10 Science

Kaveri conducted an experiment to study the energy efficiency of different bulbs. She connected a bulb A having a resistance of 100 ohms to a 240 V power supply in a laboratory. (a) How much energy will be consumed by the bulb, if it is kept ON for 4 hours each day for a week? Express your answer in kJ. (b) Kaveri connects another similar bulb B in series with bulb A and connects the combination to a 240 V supply. Will there be any change in the brightness with which bulb A glows now? Explain mathematically.

Energy efficiency refers to using less energy to perform a task while maintaining or improving performance. It involves optimizing technology and practices to reduce energy consumption, costs, and environmental impact.