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Synergids are....

Synergids are.

A

Haploid

B

Diploid

C

Triploid

D

Tetraploid

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Which of the following statements is/are correct ? (i) Endothecium lies below epidermis (ii) Fusion of egg with male gamete is called apogamy (iii) Synergids are haploid. (iv) The point at which funicle touches the ovule is raphe.

Find the odd one out (a ) Endothecium Tapetum , Middle layers , Nucellus (b) Exine , Tube nucleus , Synergids , Generative cell (c) Egg , Intine , Antipodals , Secodary nucleus

Consider the following statements. (i) Polyspermy may bring about fertilisation of egg by more than one male nucleus or the supernumerary sperms may fertilise other components of embryo sac much as synergids or antipodals. (ii) In angiosperms, pollen tube is normally an unbranched structure which ususally persists after fertilisation. (iii) Intine is the inner, pectocellulosic layer of pollen grain wall which is destroyed during acetolysis. (iv) Exine layer of pollen grain comprises of an outer non-sculptured layer sexine and an inner sculptured layer tectum. Which of the following combinations of above given statements is correct ?

How many synergid cells are there in an mature embryo sac . Mention any two major role of synergids.

In a case of polyembryony if an embryo develops from the synergid and another from the nucellus, then the synergid embryo is ul((i)) and nucellar embryo is ul((ii)) .

(A) Draw the embryo sac of a flowering plant and label (i) central cell (ii) chalazal end of the embryo sac and (iii ) synergids. (b) Name the cell that develops into the embryo sac and explain how this cell leads to the formation of embryo sac. Also mention the role played by the various cells of the embryo sac .

What is the significance of synergids ?

Assertion : The filiform apparatus of synergids guids the pollen tube into the egg. Reason : It helps in the absorption and conduction of nutrients.

Refer to the given figure of egg apparatus showing entry of pollen tube into a synergid. Identify any two of the labelled parts and select the correct option.