Flower and pollination - class-XII
Which of the following hormones is not secreted by human placenta?
Flower is a ................ organ.
Select the wrong statement.
A flower which contains only stamen or only pistil is called as
Colour of flower petals is due to
Colour of night blooming flowers is usually.
The male flowers of Vallisneria float on the surface of water with the help of.
The most primitive type of stamens are found in _____________.
Which is true for inferior ovary?
Match column I with column II and select the correct option from the given codes.
Column I | Column II |
---|---|
A. Tallest flower | (i) Maize |
B. Pronuba moth | (ii) Amorphophallus |
C. Anemophily | (iii) Salvia |
D. Entomophily | (iv) Yucca |
Which of the following options is correct?
Pollination characteristically occurs in?
Pollen kitt is present in
A long, leafless, flowering stem arising directly from a bulb like in onion, is called?
Pollination by bat is called ______________.
The transfer of pollens from anther to stigma of the same flower is called as
In a flower, the male and female reproductive parts are ............. respectively.
Chasmogamy is pollination in.
Intraspecific incompatibility is overcome by.
Which one of the following plants is pollinated by bat?
Which of the following flowers are pollinated by wind?
In oak, pollination is facilitated mainly by ___________.
Pollination in Ficus is?
Hydrophilic means pollination.
Hal inferior' ovary occurs in the flowers of:
_______ flowers have very light weighted pollen grains.
Yucca is pollinated by.
Choose the correct answers from the alternatives given.
Cheiropteriphily is the name given to pollination by
Even in absence of pollinating agents seed setting is assured in
Plants of which one of the following groups of genera are pollinated by the same agency.
With reference to the pollination stage in angiosperms, consider the following statements.
a. Pollen grains become dehydrated
b. Antipodals degenerate
Which of the statements given is/are correct?
Hypohydrogamous pollination occurs in.
Intra-specific incompatibility can be overcome by.
If the number of chromosomes, in the foot of fern embryo is
8 what should be the number in its spores
Hilum of seed is
Testa of seed develops from
Tegmen develops from
Seeds are products of sexual reproduction because they
Residual persistent nucellus is known as
In cirus, adventives embryos are derived from _____________.
From which cell of embryo, plumule is produced.