An ovule that becomes curved so that the nucellus and embryo sac lies at right angles to the funicle is:
1. Campylotropous
2. Anatropous
3. Orthotropous
4. Hemitropous
Ornithophilly takes place in:
1. Yellow flower having nectaries
2. Scented flower
3. Flower with charming colour
4. Modified corolla tube
Which pair is of insectivorous plants:
1. Drosera and Vallisneria
2. Utricularia and Hydrilla
3. Allobandra and Utricularia
4. Rafflesia and Dionea
Eight-nucleated embryosac is:
1. Only monosporic
2. Only bisporic
3. Only tetra sporic
4. Any of the above
Endosperm is formed during double fertilization by:
1. Two polar nuclei & one male gamete
2. One polar nucleus & one male gamete
3. Ovum and male gamete
4. Two polar nuclei & two male gametes
Hair found in the inflorescences of Zea mays is the modification of:
1. | Style | 2. | Stigma |
3. | Spathe | 4. | Filaments |
In Angiosperms, pollen tubes liberate their male gametes into the:
1. Central cell
2. Antipodal cells
3. Egg cell
4. Synergids
What is the direction of the micropyle in the anatropous ovule:
1. | Upward | 2. | Downward |
3. | Right | 4. | Left |
In Angiosperm all four microspores of a tetrad are covered by a layer that is formed by:
1. Pectocellulose
2. Callose
3. Cellulose
4. Sporopollenin
In a flowering plant, archesporium gives rise to:
1. Only the wall of the sporangium
2. Both wall and the sporogenous cells
3. Wall and the tapetum
4. Only tapetum and sporogenous cells