Plant Growth and Development (Class XI/XII)
Embryology, pollination, and reproductive structures in plants
Questions
More than one embryo occurs in
- citrus
- mirabilis
- hibiscus
- bacteria
- -
The formation of sporophyte directly from sporophyte tissue is called
- apogamy
- apospory
- ascocarp
- apomixis
- -
Plants which flower only once in their life cycle are called
- polycarpic
- monocarpic
- pericarpic
- cleistocarpic
- -
When chalaza and micropyle are in opposite directions on a straight line, the ovule is called
- anatropous
- orthotropous
- circinotropous
- campyloptropous
- -
The endosperm of angiosperms is developed from
- antipodals
- synergids
- zygote
- secondary nucleus
- -
_______ is the development of embryo sac from any cell of the nucleus.
- Apogamy
- Apospory
- Parthenogenesis
- Embryogeny
- -
Pollen grain is a
- megaspore
- microspore
- microsporophyll
- microsporangium
- -
The ovule of angiosperms can be called
- megasporangium
- megagametangium
- microgametangium
- integumented megasporangium
- -
The term mesogamy is applied when the pollen tube enters the ovule through
- chalaza
- integument
- micropyle
- nucleus
- -
If the outermost layer of the integument becomes specialised as nutritive layer, it is called
- tapetum
- endothecium
- endothelium
- endosperm
- -
Honey, scent and odour are adapted for
- anemophily
- hydrophily
- zoophily
- entomophily
- -
If micropyle comes close to the funicle, the ovule is called
- orthotropus
- anatropus
- amphitropus
- campylotropus
- -
The stalk of ovule is called
- pedicel
- petiole
- placenta
- funicle
- -
When gynoecium matures earlier than anther, the condition is called
- protogyny
- protandry
- herkogamy
- dichogamy
- -
In cleistogamous flowers, the pollen grains are transferred by
- wind
- insects
- birds
- water
- None of these