Which of the following statements are incorrect ? (A) Most zygotes divide only after certain amount of endosperm is formed. (B) A typical dicotyledonous embryo , consists of an embryonal axis and two cotyledons. (C) The portion of embryonal axis above the level of cotyledons is the hypocotyl, which terminates with the plumule or stem tip . (D) In the grass family the cotyledon is called scutellum that is situated towards both the side of the embryonal axis. (E) The root tip is covered with a root cap. |
A, C and E A, B, C and D C, D and E C and D only |
C and D only |
The correct option is 4. C and D only (C) The portion of embryonal axis above the level of cotyledons is the hypocotyl, which terminates with the plumule or stem tip . (D) In the grass family the cotyledon is called scutellum that is situated towards both the side of the embryonal axis. Most zygotes divide only after certain amount of endosperm is formed. This is an adaptation to provide assured nutrition to the developing embryo. A typical dicotyledonous embryo consists of an embryonal axis and two cotyledons. The portion of embryonal axis above the level of cotyledons is the epicotyl, which terminates with the plumule or stem tip. The cylindrical portion below the level of cotyledons is hypocotyl that terminates at its lower end in the radicle or root tip. The root tip is covered with a root cap. In the grass family the cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. |