Types of eye twitching. Minor eyelid twitch also can be caused by irritation of the surface of the eye ( cornea) or the membranes lining the eyelids (conjunctiva). Sometimes the cause of minor eyelid twitch cannot be identified. In almost all cases it is painless and harmless.
Roots are not simply smooth, long structures. In fact, they typically have tiny hairs that cover most of the roots' length. These hairs absorb water and soluble nutrients for plant success. However, some critical nutrients, like phosphorus, are not readily absorbed by plant root hairs. Soil micro-organisms, such as earthworms, consume the surrounding elements and expel castings rich in soluble elements.
A. cortex B. stem C. parenchyma D. xylem Weegy: A (b) stem holds the leaves of the plant up and it carries nutrients from the root system to the rest of the plant. User: _______ is the process in which plants convert the energy in sunlight into the energy in the chemical bonds of carbohydrates, e.g., starches and sugars.