Предмет: Биология, автор: ioninsasha448

в каких природных условиях сформированы особенности голосеменных?

Ответы

Автор ответа: vkuksa20

Ответ:

В отличие от высших споровых растений (мхов, папоротников и др.), которые размножаются спорами, голосеменные растения размножаются семенами. Кроме голосеменных, также семенами размножаются покрытосеменные растения. Однако в отличие от голосеменных, у покрытосеменных образуется цветок и плод, а семена находятся в плоде. У голосеменных цветка и плода не образуется, а семена лежат открыто на чешуйках. Поэтому их и называют «голосеменные».

Автор ответа: maksim77773

Ответ:

Древняя группа семенных растений, появившаяся в верхнем девоне, около 370 млн лет назад. Название указывает на главную отличительную черту этих растений, a именно на то, что семяпочки, а затем и развивающиеся из них семена не имеют, в отличие от покрытосеменных, замкнутого вместилища.

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