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单词 Growing tip
释义

Growing tip

原声例句
哈佛大学《幸福课》

Of the growing tip . How about relationships?

而受惠那爱情呢?

哈佛大学《幸福课》

Everyone benefited and continued to benefit from it. That's an example of growing tip statistics research.

每个人受益良多这就是个成长尖端统计学的研究实例。

哈佛大学《幸福课》

That it is at the growing tip of a plant that the greatest genetic action takes place.

最优秀的遗传基因会在幼苗的成长尖端出现。

英语百科

Meristem

Tunica-Corpus model of the apical meristem (growing tip). The epidermal (L1) and subepidermal (L2) layers form the outer layers called the tunica. The inner L3 layer is called the corpus. Cells in the L1 and L2 layers divide in a sideways fashion, which keeps these layers distinct, whereas the L3 layer divides in a more random fashion.
Organisation of an apical meristem (growing tip) 1 - Central zone 2 - Peripheral zone 3 - Medullary (i.e. central) meristem 4 - Medullary tissue
Shoot apical meristems of Crassula ovata (left). Fourteen days later, leaves have developed (right).
10x microscope image of root tip with meristem 1 - quiescent center 2 - calyptrogen (live rootcap cells) 3 - rootcap 4 - sloughed off dead rootcap cells 5 - procambium

A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place.

Meristematic cells give rise to various organs of the plant and keep the plant growing. The shoot apical meristem (SAM) gives rise to organs like the leaves and flowers, while the root apical meristem (RAM) provides the meristematic cells for the future root growth. SAM and RAM cells divide rapidly and are considered indeterminate, in that they do not possess any defined end status. In that sense, the meristematic cells are frequently compared to the stem cells in animals, which have an analogous behavior and function.
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更新时间：2025/6/19 8:42:34