Question

Read the sources given and answer any four from the questions given below.

The most important structure formed after double fertilisation is endosperm. Endosperm is triploid in nature and serves for the nourishment of the growing embryo. The cells of this tissue store reserve food materials. Zygote forms the embryo. A dicot embryo consists of embryonal axis with two cotyledons. The portion of embryonal axis which is above the level of cotyledons is the epicotyl. Epicotyl gives rise to plumule or stem tip. The portion below the level of cotyledons is hypocotyl. Hypocotyl terminates at its lower end in the radicle or root tip. The root tip is protected by root cap. Monocots have only single cotyledon. The cotyledon of monocot is known as scutellum. At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorhiza. The epicotyl has a shoot apex which is enclosed in a hollow structure called coleoptile.

1. Which of the following is not true for the endosperm?
   1. stores food
   2. diploid
   3. triploid
   4. formed as a result of double fertilisation
2. Part of the embryonal axis which is above the level of cotyledons is called
   1. cotyledon
   2. epicotyl
   3. hypocotyl
   4. embryo
3. Нуросotyl has ______ at its lower end.
   1. radicle
   2. plumule
   3. cotyledon
   4. shoot tip
4. The cotyledon in the monocots is known as
   1. endosperm
   2. coleoptile
   3. embryonal axis
   4. scutellum
5. In monocots, the epicotyl is enclosed in the
   1. coleoptile
   2. coleorhiza
   3. root cap
   4. radicle

Answer 1

1. diploid
2. epicotyl
3. Нуросotyl has radicle at its lower end.
4. scutellum
5. coleoptile