What is the powdery substance present on tip of stamen called?
The anthers of the stamen produce a powdery material called pollen which consists of particles called __.
(a) Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel. (b) What name is given to (i) all the petals of a flower, and (ii) all the sepals of a flower? (c) What are (i) stamen, and (ii) carpel, in a flower? (d) What is the other name of carpel of a flower? (e) What is the name of the yellow powdery substance present in the anther of a flower?
A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions :
(i) What is the white powdery substance?
(ii) Why does the substance change to blue colour?
(iii) Write the chemical formula of the blue substance .
(iv) Is the blue substance an acidic salt or a basic salt?
(v) Give a reason for your answer in (iv).