how do evregreens stay green all year?

Answer 1

Yes they do. This is because evergreen trees have their green leaves all year round...and this is how it works.

Leaves come in a variety of sizes and shapes but they all have a common function: they make food using a process called photosynthesis, which is unique to green plants.When photosynthesis takes place, the plant gets water through its roots (1), which then rises to its leaves (which evergreens have all year). Here in the leaves in the presence of a green pigment called chlorophyll (2) and in the presence of energy provided by the sun (3) water is split into hydrogen and oxygen. Meanwhile, carbon dioxide enters the underside of the leaf through its pores which are called stomates (4). Next a process which we really don’t understand fully takes place. Hydrogen gas is created by the splitting of water, and it is combined with the carbon dioxide that has come into the leaf through its stomates. When this process is complete, we have a sugar that contains carbon, hydrogen, and oxygen (5). The leftover oxygen is released into the air, which helps replace the oxygen in the air that we and all other animals need to breath (6).

In very cold weather, such as winter, and when the sun is not as bright and the water in the ground is frozen, not nearly as much oxygen is given off as in the summer when the sun is bright and the water in the ground is not frozen.

Answer 2

Being evergreen is usually an adaptation to low nutrient levels. Deciduous trees (leaves turn ungreen and fall) lose nutrients whenever they lose their leaves, and they must replenish these nutrients from the soil to build new leaves. When few nutrients are available, evergreen plants have an advantage, even though their leaves and needles must be able to withstand cold and/or drought, and are thus less efficient at photosynthesis. Very low temperate area is too cold for the organic matter in the soil to decay rapidly, so the nutrients in the soil are less easily available to plants, thus favouring evergreens.

In temperate climates, evergreens can reinforce their own survival; evergreen leaf and needle litter has a higher carbon-nitrogen ratio than deciduous leaf litter, contributing to a higher soil acidity and lower soil nitrogen content. These conditions favour the growth of more evergreens and make it more difficult for deciduous plants to persist. In addition, the shelter provided by existing evergreen plants can make it easier for other evergreen plants to survive cold and/or drought.♥

Answer 3

hello

thay actually dont have any reason not to stay green , thay do the photosynthasy all year and thay usually live in places wich is mostly sunny , atlis tjair origen is in places like this anyway.