Diversity In Living Organisms — Science STD 9 — Question

How many centres have been established in India for artificial insemination of cows and buffaloes?

Give the differences between cytoplasm and nucleoplasm.

In photosynthesis, 6 molecules of carbon dioxide combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula C₆H₁₂O₆. How many grams of water would be required to produce 18g of glucose? Compute the volume of water so consumed assuming the density of water to be 1g cm^–3.

Explain how a rocket works.

Give one difference between longitudinal and transverse wave.

It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?

Explain how, bats use ultrasound to catch the prey.

While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56°C). What technique can be employed to get back the acetone? Justify your choice.

How will you separate a mixture of iron filings and powdered carbon?