BOTANY

Detailed explanation-1: -Tree rings are natural markings on the tree trunk that indicate how old it is. A tree’s age can be determined by counting the number of rings, which is how scientists date trees.

Detailed explanation-2: -Trees Grow: At the cambium (old xylem cells become heartwood, old phloem cells become bark)

Detailed explanation-3: -If the xylem of the plant is removed, upward movement of water will stop leading to wilting of leaves and ultimately causes the death of a plant. In the absence of water, the plant will not be able to prepare food and also perform other essential activities.

Detailed explanation-4: -Older xylem is known as heartwood and is found in the middle of the trunk. The heartwood is often darker in color and is not very active in transport. The darker color is caused by resins, oils and minerals, which are deposited as the tree grows. The xylem (sapwood and heartwood) makes up the majority of a tree trunk.