Biology Questions and Answers
Angiosperms
- What are angiosperms, the
flowering plants? What is the
main feature that
distinguishes them from the
gymnosperms?
Flowering plants hav(phanerogamic plants). Te flowers anhey differ fromd seeds
gymnosperms by having their seeds
within fruits.
- What are the two main
groups into which flowering
plants are divided?
Angiosperm plants are divided into
monocotyleddicotyledonous (dicots).onous (monocots) and
- What are the main
morphological differences
between monocot plants and
dicot plants?
The main dmonocots and dicotsifferentiation are: number of criteria between
cotyledons (seed leaf) in seeds, one in
monocotsleaf veins, parallel and two in in monocots,dicots; pattern of
reticulated in number, multiples odicots;f three in monocots, multiplicity of petal (^)
multiples of four or five in dicots;
position of vascular bundles in the stem,
scattered in monocots, concentrically
ringed in dicots.Grasses, banana tree, sugar cane,
orchids are examples of monocots.
Sunflowers, oaks anexamples of dicots.d waterlilies are
- What are the androecium
and the gynoecium? What are
the other structures of
flowers?
Androecium is the reproductive structurset of malees of flowers. It (^)
comprehends the stamens formed of
filament and anther; androecium that may hone flower have one oras one
several stamens. Gynoecium is the set
of female flowers. It generally is composereproductive structures ofd of a (^)
single pistil that includes the stigma, the
style anusually surrounds the centrald the ovary. The androecium
gynoecium.
Besides the androecium and the
gynoecium typicalof peduncle, sepals a flowers are also madend petals.
- What is pollination? What
are the main forms of
pollination?
The process in which male gametophytes of phanerogamicpollen grains (th e
plants) reach the female gametophyte is
called pollination.
The main forms of pollination are:
anemophily, in by wind. Hydrophily, powhich pollen is carriedllination helped (^)
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