Biology Questions and Answers
A typical seed is composed of the
embryo, seeds of angiospendosperm and shell. Withierms there are one orn (^)
two cotyledons (seed leaf, one in
monocots, two in dicots).
The endosperm is the tissue within the
seed that has the function othe embryo. f nourishing
- How different are the
endosperm of gymnosperms
and the endosperm of
angiosperms?
In gymnosperms thaploid (n), it is called primaryhe endosperm is
endosperm. Inendosperm is triploid angiosp(3n), it is calleerm the (^) d
secondary endosperm.
- What are cotyledons?
Cotyledostructures fns, or seed leaves, areormed by the embryo (^) of
angiosperms to absorb nutrients from
the endosperm and to store transfer these nutrients to the embryo.and (^)
(Cotyledons are auxiliary embryonic
structures).
Seeds of monocots have a single
cotyledon. Seeds of dicots have twocotyledons.
- What are the main
functions of fruits?
The main functions oprotection and spreading of seeds.f fruits are the
- From which floral
structure do fruits come?
Fruits are modified ovaries of the
flowers. - How are fruits formed?
The fecundation in the release of hormones that act upangiosperms trigongers
the ovaries. The ovary wall then
develops into seeds. a fruit that contains the - Are fruits always the flesh
part of the “fruits”? Is the
edible part of the onion a
fruit?
In some so-calleis not the flesh part. For d fruits the actual frexample, theuit
flesh part of the strawberry is not the
fruit. Thon the surface of the strawberry.e fruits are the small hard dots
Another example: thcashew is not the fruit. The fruit is thee flesh part of the
nut.
The edible part of the onion is the stemof the plant and not the fruit. - Why are there plants
having single-seeded fruits
and plants having fruits with
more than one seed?
Plants that produce singlfor example, mango and avocade-seeded fruits,o, often
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