The phloem (food carrying tubes) and the xylem (water and minerals carrying tube) are found in the stem
That their food sources are around the stems is a reason why aphids tend not to be found in leaf litter.Specifically, an aphid (Aphidoidea family) is an insect with piercing mouthparts. It pursues a diet which is rich in plant sap. It will be more interested in the fluids which are available in the shoots than the nutrients which are released through decomposition in the debris of fallen foliage around plants.
No but its mostly a stem. The Yam plant has leaves and roots but the food is the stem of the plant. If you are talking about the food, yes but if you are talking about the plant, no.
it is found in the plant --> stem.....
Aphids, also known as Greenfly, are mostly monophagous. This means that they will eat only one species of plant. However, some species of Aphid are myxus pwesicae and will eat from many different plants across a variety of families. The aphids lust of plant matter can make them a pest to many horticulturists.So, in short, Greenfly eat plants.To be more precise they take in the sap from the plant. Sap is full of sugars, minerals and goodies that the plant would otherwise use to grow. So when this is diverted to make the greenfly grow the plant suffers.A couple of interesting points: greenfly are a major source of food for ladybirds and also blue-tits ... and ... they don't actually suck, they just insert their needle like mouths into a stem and the pressure in the stem forces the sap into their bodies!
Vascular tissue
stem, leaves..
Sugarcane plants have a fibrous and thick stem that is filled with sucrose. While the stem may become harder as the plant ages, it is not considered a true woody stem like those found in trees.
it is a woody stem plant
The plant stem has two functions. The plant stem supports the leaves and flowers. The plant stem also transports water and food to the plant.
On the epidermis of leaf, stem and fruit wall etc.
In cactus leaves are absent. Chlorophyll are found in trunk mainly.
The phloem is closer to the cortex in a plant stem.