Brian : Information being sent throughout the body.
Spinal cord: Sends sensory messages.
PNS: connects to the central nervous system
<span>maintains a constant INTERNAL environment
so other options included internal variable and external environment. but its internal and environment</span>
Answer:
Explanation:
In a cross-section of an adult tree trunk, the outer layer that interacts with the environment is called periderm (Layer D). The second layer that follows the periderm is the phloem (Layer C). The next layer is the cambium, which produces phloem cells and xylem cells (Layer B). The secondary xylem follows the vascular cambium (Layer A) and finally, the medulla is located in the middle of the trunk.
The secondary xylem proceeds from the vascular cambium activity. Its cells are orientated in different ways composing the vertical/axial system and the horizontal/transversal system. The secondary xylem is essential to the tree growth in high because of its resistance and the capacity to transport water long distances. Secondary xylem functions are to transport water and minerals through its vessels and tracheids, to provide support and resistance to the plant, and to store reserve substances.
Answer:
Several tools aid ecologists in measuring abiotic factors, including thermometers, altimeters, pH meters and many other devices.
