Question

Complete the paragraph using the words given below in the box.

Megaspore mother cell, Integument, Nucellus, Ovary, Ovule, Microspore mother cell

Answer 1

☆ MEGASPORE MOTHER CELL (MMC)

• MMC IS A LARGE CELL CONTAINING DENSE CYTOPLASM AND PROMINENT NUCLEUS.

• MMC UNDERGOES MEIOSIS AND FORM LINEAR TETRAD OF FOUR HAPLOID MEGASPORE (OUT OF WHICH ONE IS REMAINS FUNCTIONAL AND THREE DEGENERATED)

☆ INTEGUMENT

• PROTECTIVE ENVELOP OF OVULE

☆ NUCELLUS

• THE MASS OF TISSUE INCLOSED WITH THE INTEGUMENT AND FORMS THE BODY OF OVULE

☆ OVARY

• THE BASAL BULGED PART OF THE PISTIL OR CARPAL

• OVARY HAS AN OVARIAN CAVITY WITH ONE OR MORE CHAMBERS

• PLACENTA IS LOCATED HERE

☆ OVULE

• OVULE GENERALLY HAS A SINGLE EMBRYO SAC

• OVULE HAS SIX TYPES ON THE BASIS OF RELATIVE POSITION OF MICROPHYLE

• ORTHOTROPUS
• ANATROPUS
• HEMIANATROPUS
• COMPYLOTROPUS
• AMPHITROPUS
• CIRCINOTROPUS

☆ MICROSPORE MOTHER CELL

• POLLEN GRAINS IN MALE PLANTS IS CALLED AS MICROSPORE MOTHER CELL

• IT DIVIDED MITOTICALLY INTO TWO CELL

• VEGETATIVE CELL
• GENERATIVE CELL

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