The pinyin for "root, stem and leaf" is "gēn jīng yè".

1. Root (gēn): "Root" refers to the root of a plant, which is the organ that absorbs and fixes nutrients. In Pinyin, "root" is pronounced "gēn".

2. Stem (jīng): "stem" refers to the stem of a plant, which is the part of the plant that supports and transports water and nutrients. In Pinyin, "stem" is pronounced "jīng".

3. Leaf (yè): "Leaf" refers to the leaf part of a plant, which is the main organ for photosynthesis and respiration. In Pinyin, "leaf" is pronounced "yè".

The combination of these three words, "root, stem and leaf," describes the basic structure of a plant, referring to the roots, stems and leaves of the plant, respectively. The term is often used in biology and botany to describe the morphological structure of plants and to help gain a more complete understanding of how plants grow and develop.

Characteristics of Roots, Stems and Leaves

1. Characteristics of Roots

Absorption of Nutrients:Roots are the absorptive organs of the plant, absorbing water and minerals through the surface cells of the roots and supplying them to the rest of the plant.

Fixing the plant: roots provide support for the plant by growing deeper into the soil, preventing the plant from falling over.

Storing nutrients: some plant roots also store nutrients, such as carrots, which store large amounts of starch.

2. Characteristics of stems

Supporting plants: stems are the supporting structures of plants, holding up leaves and flowers to a position where they can reach the sun.

Transporting water and nutrients: stems contain conduits that are used to transport water and nutrients and maintain the water balance in the plant.

Storage of nutrients: the stems of some plants are capable of storing nutrients, such as the starch stored in the tubers of potatoes.

3. Characteristics of leaves

Performing photosynthesis: Leaves are the main place for plants to photosynthesize, and through the chlorophyll in the chloroplasts, plants are able to synthesize organic matter using sunlight.

Gas exchange: leaves carry out gas exchange through stomata, absorbing carbon dioxide and releasing oxygen.

Adaptation to the environment: the form and structure of the leaf adapts according to the environment, for example, thorny leaves help the plant to adapt to dry conditions.