Question

Read the following statements:
Which of the above statements are correct?
(i) Wheat, maize barley, castor and sunflower seeds are endospermic or albuminous
(ii) Most zygotes divide only after certain amount of endosperm is formed
(iii) Though the seed differ greatly, the early stages of embryo development is similar in both monocots and dicots
(iv) The zygote divides to form proembryo and subsequently globular, heart-shaped and mature embryo.
(v) Epicotyl and hypocotyl are absent in monocot seeds

• A. (i),(ii),(iii)and (iv)
• B. (i),(ii)and (iii)
• C. (i),(iii)and( v)
• D. (iii),(iv)and (v)
• E. (i),(v) and (ii)

Answer 1

The correct option is A (i),(ii),(iii)and (iv)

A. (i), (ii), (iii) and (iv)

EXPLANATION: Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds, e.g., castor, wheat, grasses, barley, etc. Most zygotes in angiosperms divide after a certain amount of the endosperm is framed. Zygotes divide to form two cells- terminal cell or upper cell and basal cell or lower cell. The terminal cells have globular-shaped proembryo and the basal cells are heart-shaped, due to the presence of two rudimentary cotyledons. In the first stage of embryonic development, a single-celled zygote have many rapid cell divisions. These cell divisions are called cleavage, to form blastula, which are similar to the ball of cells.