State the number of segment in earthworm which are covered by a prominent dark band or clitellum.

In which segment in earthworm, the ovary is present?

State the position and function of clitellum of earthworm.

Name the type of filaments which constitute A- Band (Dark band) and I - band (Light band).

In each of the following problems, clearly state what the relevant and irrelevant factors are while going through Steps 1, 2 and 3 given in this chapter :- Suppose a company needs a computer for some period of time. The company can either hire a computer for Rs 2,000 per month or buy one for Rs 25,000. If the company has to use the computer for a long period, the company will pay such a high rent, that buying a computer will be cheaper. On the other hand, if the company has to use the computer for say, just one month, then hiring a computer will be cheaper. Find the number of months beyond which it will be cheaper to buy a computer.

In each of the follwing pairs of numbers,state which whole number is on the left of the other number on the number line .Also write them with the appropriate sign(>, 370,307

In each of the follwing pairs of numbers,state which whole number is on the left of the other number on the number line .Also write them with the appropriate sign(>, 530,502