cucumber
发表于 2025-3-21 16:19:39
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演讲
发表于 2025-3-21 20:28:53
Endosperm Development and Embryogenesiseries of structural transformations, give rise to the prototype of the adult plant known as the embryo, consisting of the root apical meristem at one end and the shoot apical meristem at the other. As the ovule is transformed into the seed, the developing embryo obtains its nurture and nourishment from the surrounding cells of the endosperm.
conscience
发表于 2025-3-22 03:30:54
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nonradioactive
发表于 2025-3-22 08:25:12
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ELUDE
发表于 2025-3-22 10:59:23
Megasporogenesis and Formation of the Embryo Sacdifferentiation in flowering plants. In addition to satisfying the relatively simple requirement of housing the egg, the embryo sac must also anticipate the nutritional demands of the egg and the developing zygote. This problem is solved by the presence of ultrastructural features in the cells of the embryo sac for transfer of nutrients.
Individual
发表于 2025-3-22 13:32:56
and continues to grow rapidly as new discoveries pile one on top of the other; moreover, these striking advances in our knowledge have put plant developmental biology well ahead of other aspects of the study of plants. This has come about after a period of neglect and stagnation in the field and ha
Individual
发表于 2025-3-22 18:34:57
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说明
发表于 2025-3-22 23:28:39
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MUTE
发表于 2025-3-23 01:39:28
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SEEK
发表于 2025-3-23 06:34:36
Dormancy of Seeds and Buds evolved in other plant organs such as buds of woody and herbaceous plants and shrubs as well as in tubers, bulbs, and rhizomes. A common feature displayed by these organs is reduced growth; in seeds, growth of the embryo is blocked, whereas in buds and other organs, growth of the shoot apical meristem is inhibited.