Biology Questions and Answers
have ovaries with only one egg inside.
Fruits with mooriginated from plare than one seed arents whose ovaries (^)
have more than one egg.
- What are infructescences,
pseudofruits and
parthenocarpic fruits?
Infructescences arformed from inflorescee aggregated fruitsnces, aggregated (^)
flowers. Grapinfructescences. Pseudofruits are e clusters are examples of“fruits” (^)
not madtheir true fruits lack de in the ovaries anevelopment andd in general
are found within the flesh, like in apples
and pears. Parththose made withoenocarpic fut fecundation, bruits arey (^)
means of hormonal stimuli, like
bananas.
- What is the evolutionary
importance of the fruits for
the angiosperms?
The fruits contain seeds and they can
detach fground or can rom thserve as food for animals.e plant falling on the (^)
Therefore with the emergence of fruits
the seeds of angiosptransported across long distanceserms could be
contributing species. to the propagation of the
- What are the trends of the
gametophyte in the evolution
of plants?
A tendency of the gametophyte
evolution formation oin plants has bef gametes that aren towards thee
independent from water. In bryophytes
and in pteridophytes thtotally dependent on water. Ine fecundation is
phanerogamic plants such dependency
does not exist.
Another tendency is the reduction in the
size and duration oIn bryophytes the gametophyte isf the gametophyte.
indeed the lasting stage. Inpteridophytes, gymnosperms aangiosperms it became the temporarynd (^)
stage and its relative size successively reduced. was
A third evolutionary interdependency between gametophytestrend relates to the (^)
and sporophytes. In bryophytes the
sporophyte is egametophyte to ntirely dsurvive. Iependent on then the
remaining plants the sporophyte is the
independent stagautotrophic gametophyte ie and the oncen bryophytes (^)
and pteridophytes became dependent
upon the sporophyte in phanerogamic plants. the
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