Question

(a) Draw a labelled diagram of L.S. of an embryo of grass (any six labels).
(b) Give reason for each of the following:
(i) Anthers of angiosperm flowers are described as dithecous.
(ii) Hybrid seeds have to be produced year after year.

Answer 1

Explanation:

Principle: Electric generator works on the principle of electromagnetic induction. It converts mechanical energy into electrical energy. Construction: A loop ABCD is rotated in a permanent magnetic field. Its ends are connected with two semi-circular rings as shown in the figure below.

hope

Answer 2

Because if the seed collected from hybrid plant are sown ,the plant in the progeny will segregate (according to the Mendel's law of segregation) and do not maintain hybride characters.