高等植物的花朵有相似的结构：最外层的保护幼芽的萼片（sepals）、次外层的颜色鲜艳吸引昆虫传粉的花瓣（petals）、内部贮满花粉的雄蕊（stamens）、最内层的稍后会发育为果实和种子的心皮（carpels）。这些器官的发育过程由许多基因控制。最近，德国马克斯 ...

Flowers are complex structures. They typically consist of four types of organ arranged in four whorls: sepals, petals, stamens and carpels. No wonder that their development is complicated.

https://doi.org/10.2307/2435922 • https://www.jstor.org/stable/2435922 1. There are two kinds of carpels in the Cruciferae; a valve, or "sterile" carpel, and a ...

Last May, Yanofsky and his colleagues discovered a trio of genes that, when modified together, produced so-called double flowers¿blooms in which the petals, stamens and carpels all became sepals.

The fibrous material, or pith, around the fruit sections, or carpels, is made of pectin. This substance is composed of long chains of galacturonic acid, a simple sugar with a ring-shaped molecular ...

Flowers are usually built from the same basic four parts: sepals, petals, stamens and carpels, but daffodils also have a fifth part, known as the trumpet, or corona. Scientists have questioned ...