Tissues — Science STD 9 — Question

Local names used for recognising objects are called ..............

What is the time of sowing rabi crops?

Which mineral is present in bone?

Name the causal organism of diarrhea.

Give an example of flightless birds?

1. P-V, Q-IV, R-III, S-II, T-I
2. P-I, Q-II, R-IV, S-III, T-V
3. P-II, Q-V, R-IV, S-III, T-I
4. P-V, Q-III, R-IV, S- II, T-I

Why it is difficult to develop vaccines for some diseases?

Name a vaccination which provides lifelong immunity.