Question:

In china rose the flowers are :

Updated On: Jul 11, 2024
  • Zygomorphic, epigynous with twisted aestivation
  • Actinomorphic, hypogynous with twisted aestivation
  • Actinomorphic, epigynous with valvate aestivation
  • Zygomorphic, hypogynous with imbricate aestivation
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The Correct Option is B

Solution and Explanation

In China rose the flowers are actinomorphic i.e., it can be divided into two equal radial halves in any radial plane passing through the centre; they are hypogynous, i.e., the gynoecium occupies the highest position, while the other parts are situated below it; | they have twisted aestivation i.e., one margin of petal | overlaps that of the next one and so on.

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Concepts Used:

Morphology of Flowering Plants

Morphology in flowering plants tells us that every plant has two systems such as a root system and a shoot system. The root system digs deep into the ground and structures a system of its own. On the other hand, the shoot system is the one that is above ground level and includes various plant parts. 

Root System

The descending part of the plant grows under the soil roots. During the germination process, the radicle from the seed grows earthward and branches out. The branches along with the primary root are called the root system. Roots lack chlorophyll and therefore they are not green in color. Roots are positively geotropic and hydrotropic, that is, they grow downwards ground and water, and negatively phototropic, which is growing away from light.

There are three types of root systems found in plants are as follows:

  1. TapRoot System
  2. Fibrous Root System
  3. Adventitious Root System

Shoot System

The stem is also an essential element of the plant. It is the ascending portion of the plant axis that bears branches, flowers, leaves, and fruits, as well as aiding in water and mineral conduction. It is the plant's aerial portion, brought about from an embryo's plumule or germinating seeds. Young stems are ordinarily green, but they finally turn woody and brown.