State the function of flowers in the flowering plants.

Consider two elements 'A' (Atomic number 17) and 'B' (Atomic number 19):

(i) Write the positions of these elements in the modern periodic table giving justification.

(ii) Write the formula of the compound formed when 'A' combines with 'B'.

(iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.

Write the names of those parts of a flower which serve the same function as the following do in the animals:

(i) testis (ii) sperm (iii) ovary (iv) egg

Mendel crossed tall pea plants with dwarf pea plants in his experiment. Write his observations giving reasons on the F1 and F2 generations.

List any two contrasting characters other than height that Mendel used in his experiments in pea plants.