Answer:
because science
Explanation:
The Sun provides the energy to power the water cycle. When water changes state in the water cycle, the total number of water particles remains the same. The changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition.
Cell division starts with one parent cell and finishes with two cells. Each daughter cell has the same DNA as the parent cell
During acclimatization over a few days to weeks, the body produces more red blood cells to counteract the lower oxygen saturation in blood in high altitudes. Full adaptation to high altitude is achieved when the increase of red blood cells reaches a plateau and stops.Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). ... At the beginning of exercise, your body removes the parasympathetic stimulation, which enables the heart rate to gradually increase.
D)all of them
Answer:
A or C
Explanation:
Xylem consists of several different types of <u>cells</u>: fibers for support, parenchyma for storage, and tracheary elements for the transport of water. The tracheary elements are arranged as<u> long tubes through which columns of water are raised</u>. In a tree trunk, the innermost part of the wood is dead but structurally strong xylem, while the outer part consists of living xylem, and beyond it, layers of cambium and phloem.