Answer:
The xylem consists of tracheary elements, xylem parenchyma cells, and xylem fiber cells.
Explanation:
To measure large distances in the universe astronomers have coined a technique called 'cosmic distance ladder'. It is basically a succession of different methods applied in accordance to distances between objects.
A similarity between the nervous system and the hormone secreting system in humans is that they both <span>help to maintain homeostasis.
Homeostasis is <span>the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.</span>
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