AP BIOLOGY

Detailed explanation-1: -The primary functions of the stem are to support the leaves; to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis; and to transport these products from the leaves to other parts of the plant, including the roots.

Detailed explanation-2: -Vascular bundles consist of phloem tissue, xylem tissue, and a layer called the cambium between them. Each vascular bundle is supported by a tough section of parenchyma and sclerenchyma tissue called the pericycle. Pith is the spongy storage tissue in the center of stems, also made up of parenchyma cells.

Detailed explanation-3: -Stem is an essential part of a plant that provides mechanical support to the whole plant body. Every other part of the plant except the one underground depends on the stem for support. This includes leaves, fruits, flowers, branches, etc.

Detailed explanation-4: -Ground tissue helps support the stem and is called pith when it is located towards the middle of the stem and called the cortex when it is between the vascular tissue and the epidermis.

Detailed explanation-5: -The primary function (most important job) of a stem is mechanical support. Mechanical support means the plant’s stem supports the plant and holds it upright to help it grow toward sunlight. Stems also connect the other organs of the plant. Both the leaves and roots are connected to the stem!