Answer: Xylem fibers and xylem parenchyma are the elements of the xylem which is a vascular tissue in plants.
Explanation:
Xylem fibers are dead cells whereas the xylem parenchyma are living cells.
Xylem fibers are responsible for providing structural support to the entire structure of xylem whereas the xylem parenchyma is involved in conducting of water and minerals.
In xylem fibers the lignin is present whereas it is absent in xylem parenchyma.
Answer: Made up of
Explanation:
Composed can mean several things such as being able to remain calm or being made up of something. In this case it is the latter. When they say that something is composed of something else, it means that the first thing is made up of the second thing.
In this case therefore, the oceanic crust being composed of pieces that cover the ocean floor means that the oceanic crust is made up of those pieces.
Answer:
Parasitism
Commensalism
Mutualism
Explanation:
These are the answers in order.
Answer:
unicellular organisms: diatom, E. coli...
Explanation:
